Moves some list initializations to New

Fixes missing ..() calls in New()

code/game/atoms.dm

@@ -11,7 +11,7 @@
 	var/datum/reagents/reagents = null
 
 	//This atom's HUD (med/sec, etc) images. Associative list.
-	var/list/image/hud_list = list()
+	var/list/image/hud_list = null
 	//HUD images that this atom can provide.
 	var/list/hud_possible
 

code/game/atoms_movable.dm

@@ -74,7 +74,7 @@
 			if(loc == newloc) //Remove this check and people can accelerate. Not opening that can of worms just yet.
 				newtonian_move(last_move)
 
-	if(. && buckled_mobs.len && !handle_buckled_mob_movement(loc,direct)) //movement failed due to buckled mob(s)
+	if(. && has_buckled_mobs() && !handle_buckled_mob_movement(loc,direct)) //movement failed due to buckled mob(s)
 		. = 0
 
 //Called after a successful Move(). By this point, we've already moved
@@ -137,7 +137,7 @@
 	stop_pulling()
 	if(buckled)
 		buckled.unbuckle_mob(src,force=1)
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		unbuckle_all_mobs(force=1)
 	. = ..()
 	if(client)

code/game/gamemodes/clock_cult/clock_structures.dm

@@ -461,7 +461,7 @@
 /obj/effect/clockwork/spatial_gateway/attack_hand(mob/living/user)
 	if(user.pulling && user.a_intent == "grab" && isliving(user.pulling))
 		var/mob/living/L = user.pulling
-		if(L.buckled || L.anchored || L.buckled_mobs.len)
+		if(L.buckled || L.anchored || L.has_buckled_mobs())
 			return 0
 		user.visible_message("<span class='warning'>[user] shoves [L] into [src]!</span>", "<span class='danger'>You shove [L] into [src]!</span>")
 		user.stop_pulling()

code/game/gamemodes/shadowling/shadowling_abilities.dm

@@ -136,7 +136,7 @@
 	if(user.pulledby)
 		user.pulledby.stop_pulling()
 	user.stop_pulling()
-	if(user.buckled_mobs.len)
+	if(user.has_buckled_mobs())
 		user.unbuckle_all_mobs(force=1)
 	sleep(40) //4 seconds
 	if(!qdeleted(user))

code/game/machinery/machinery.dm

@@ -177,11 +177,11 @@ Class Procs:
 	density = 1
 	if(!target)
 		for(var/mob/living/carbon/C in loc)
-			if(C.buckled || C.buckled_mobs.len)
+			if(C.buckled || C.has_buckled_mobs())
 				continue
 			else
 				target = C
-	if(target && !target.buckled && !target.buckled_mobs.len)
+	if(target && !target.buckled && !target.has_buckled_mobs())
 		occupant = target
 		target.forceMove(src)
 	updateUsrDialog()

code/game/machinery/washing_machine.dm

@@ -226,7 +226,7 @@
 
 	if(user.pulling && user.a_intent == "grab" && isliving(user.pulling))
 		var/mob/living/L = user.pulling
-		if(L.buckled || L.buckled_mobs.len)
+		if(L.buckled || L.has_buckled_mobs())
 			return
 		if(state_open)
 			if(iscorgi(L))

code/game/mecha/equipment/tools/medical_tools.dm

@@ -77,7 +77,7 @@
 	if(target.buckled)
 		occupant_message("<span class='warning'>[target] will not fit into the sleeper because they are buckled to [target.buckled]!</span>")
 		return
-	if(target.buckled_mobs.len)
+	if(target.has_buckled_mobs())
 		occupant_message("<span class='warning'>[target] will not fit into the sleeper because of the creatures attached to it!</span>")
 		return
 	if(patient)

code/game/mecha/mecha.dm

@@ -806,7 +806,7 @@
 		user << "<span class='warning'>You are currently buckled and cannot move.</span>"
 		log_append_to_last("Permission denied.")
 		return
-	if(user.buckled_mobs.len) //mob attached to us
+	if(user.has_buckled_mobs()) //mob attached to us
 		user << "<span class='warning'>You can't enter the exosuit with other creatures attached to you!</span>"
 		return
 
@@ -819,7 +819,7 @@
 			user << "<span class='danger'>[occupant] was faster! Try better next time, loser.</span>"
 		else if(user.buckled)
 			user << "<span class='warning'>You can't enter the exosuit while buckled.</span>"
-		else if(user.buckled_mobs.len)
+		else if(user.has_buckled_mobs())
 			user << "<span class='warning'>You can't enter the exosuit with other creatures attached to you!</span>"
 		else
 			moved_inside(user)

code/game/objects/buckling.dm

@@ -4,15 +4,13 @@
 	var/can_buckle = 0
 	var/buckle_lying = -1 //bed-like behaviour, forces mob.lying = buckle_lying if != -1
 	var/buckle_requires_restraints = 0 //require people to be handcuffed before being able to buckle. eg: pipes
-	var/list/mob/living/buckled_mobs = list()
+	var/list/mob/living/buckled_mobs = null //list()
 	var/max_buckled_mobs = 1
 
-
-
 //Interaction
 /atom/movable/attack_hand(mob/living/user)
 	. = ..()
-	if(can_buckle && buckled_mobs.len)
+	if(can_buckle && has_buckled_mobs())
 		if(buckled_mobs.len > 1)
 			var/unbuckled = input(user, "Who do you wish to unbuckle?","Unbuckle Who?") as null|mob in buckled_mobs
 			if(user_unbuckle_mob(unbuckled,user))
@@ -27,14 +25,23 @@
 		if(user_buckle_mob(M, user))
 			return 1
 
-
 //Cleanup
 /atom/movable/Destroy()
 	. = ..()
 	unbuckle_all_mobs(force=1)
 
+/atom/movable/proc/has_buckled_mobs()
+	if(!buckled_mobs)
+		return FALSE
+	if(buckled_mobs.len)
+		return TRUE
+
 //procs that handle the actual buckling and unbuckling
 /atom/movable/proc/buckle_mob(mob/living/M, force = 0)
+	if(!buckled_mobs)
+		buckled_mobs = list()
+	if(!M.buckled_mobs)
+		M.buckled_mobs = list()
 	if((!can_buckle && !force) || !istype(M) || (M.loc != loc) || M.buckled || (M.buckled_mobs.len >= max_buckled_mobs) || (buckle_requires_restraints && !M.restrained()) || M == src)
 		return 0
 	if(!M.can_buckle() && !force)
@@ -72,6 +79,8 @@
 		post_buckle_mob(.)
 
 /atom/movable/proc/unbuckle_all_mobs(force=0)
+	if(!has_buckled_mobs())
+		return
 	for(var/m in buckled_mobs)
 		unbuckle_mob(m, force)
 

code/game/objects/items/weapons/airlock_painter.dm

@@ -16,6 +16,7 @@
 	var/obj/item/device/toner/ink = null
 
 /obj/item/weapon/airlock_painter/New()
+	..()
 	ink = new /obj/item/device/toner(src)
 
 //This proc doesn't just check if the painter can be used, but also uses it.

code/game/objects/items/weapons/tools.dm

@@ -104,6 +104,7 @@
 	return(BRUTELOSS)
 
 /obj/item/weapon/screwdriver/New(loc, var/param_color = null)
+	..()
 	if(!icon_state)
 		if(!param_color)
 			param_color = pick("red","blue","pink","brown","green","cyan","yellow")

code/game/objects/structures/beds_chairs/alien_nest.dm

@@ -18,7 +18,7 @@
 	return ..()
 
 /obj/structure/bed/nest/user_unbuckle_mob(mob/living/buckled_mob, mob/living/user)
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		for(var/buck in buckled_mobs) //breaking a nest releases all the buckled mobs, because the nest isn't holding them down anymore
 			var/mob/living/M = buck
 
@@ -60,7 +60,7 @@
 	if(!user.getorgan(/obj/item/organ/alien/plasmavessel))
 		return
 
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		unbuckle_all_mobs()
 
 	if(buckle_mob(M))

code/game/objects/structures/beds_chairs/bed.dm

@@ -134,7 +134,7 @@
 			return
 
 		var/obj/structure/bed/roller/R = target
-		if(R.buckled_mobs.len)
+		if(R.has_buckled_mobs())
 			if(R.buckled_mobs.len > 1)
 				R.unbuckle_all_mobs()
 				user.visible_message("<span class='notice'>[user] unbuckles all creatures from [R].</span>")

code/game/objects/structures/beds_chairs/chair.dm

@@ -71,14 +71,14 @@
 		return ..()
 
 /obj/structure/chair/attack_tk(mob/user)
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		..()
 	else
 		rotate()
 	return
 
 /obj/structure/chair/proc/handle_rotation(direction)
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		for(var/m in buckled_mobs)
 			var/mob/living/buckled_mob = m
 			buckled_mob.buckled = null //Temporary, so Move() succeeds.
@@ -99,7 +99,7 @@
 /obj/structure/chair/proc/spin()
 	dir = turn(dir, 90)
 	handle_layer()
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		for(var/m in buckled_mobs)
 			var/mob/living/buckled_mob = m
 			buckled_mob.dir = dir
@@ -167,7 +167,7 @@
 	return ..()
 
 /obj/structure/chair/comfy/post_buckle_mob(mob/living/M)
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		overlays += armrest
 	else
 		overlays -= armrest
@@ -215,7 +215,7 @@
 /obj/structure/chair/MouseDrop(over_object, src_location, over_location)
 	. = ..()
 	if(over_object == usr && Adjacent(usr))
-		if(!item_chair || !ishuman(usr) || buckled_mobs.len || src.flags & NODECONSTRUCT)
+		if(!item_chair || !ishuman(usr) || has_buckled_mobs() || src.flags & NODECONSTRUCT)
 			return
 		if(usr.incapacitated())
 			usr << "<span class='warning'>You can't do that right now!</span>"

code/game/objects/structures/crates_lockers/closets.dm

@@ -141,7 +141,7 @@
 		if(!isliving(AM)) //let's not put ghosts or camera mobs inside closets...
 			return
 		var/mob/living/L = AM
-		if(L.anchored || L.buckled || L.incorporeal_move || L.buckled_mobs.len)
+		if(L.anchored || L.buckled || L.incorporeal_move || L.has_buckled_mobs())
 			return
 		if(L.mob_size > MOB_SIZE_TINY) // Tiny mobs are treated as items.
 			if(horizontal && L.density)
@@ -160,7 +160,7 @@
 			return
 		if(!allow_dense && AM.density)
 			return
-		if(AM.anchored || AM.buckled_mobs.len || (AM.flags & NODROP))
+		if(AM.anchored || AM.has_buckled_mobs() || (AM.flags & NODROP))
 			return
 	else
 		return

code/game/objects/structures/electricchair.dm

@@ -37,7 +37,7 @@
 	var/datum/effect_system/spark_spread/s = new /datum/effect_system/spark_spread
 	s.set_up(12, 1, src)
 	s.start()
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		for(var/m in buckled_mobs)
 			var/mob/living/buckled_mob = m
 			buckled_mob.electrocute_act(85, src, 1)

code/game/objects/structures/kitchen_spike.dm

@@ -40,7 +40,7 @@
 
 /obj/structure/kitchenspike/attackby(obj/item/I, mob/user, params)
 	if(istype(I, /obj/item/weapon/crowbar))
-		if(!buckled_mobs.len)
+		if(!has_buckled_mobs())
 			playsound(loc, 'sound/items/Crowbar.ogg', 100, 1)
 			if(do_after(user, 20/I.toolspeed, target = src))
 				user << "<span class='notice'>You pry the spikes out of the frame.</span>"
@@ -57,7 +57,7 @@
 	if(user.pulling && isliving(user.pulling) && user.a_intent == "grab" && !buckled_mobs.len)
 		var/mob/living/L = user.pulling
 		if(do_mob(user, src, 120))
-			if(buckled_mobs.len) //to prevent spam/queing up attacks
+			if(has_buckled_mobs()) //to prevent spam/queing up attacks
 				return
 			if(L.buckled)
 				return

code/game/objects/structures/plasticflaps.dm

@@ -23,7 +23,7 @@
 		return prob(60)
 
 	var/obj/structure/bed/B = A
-	if (istype(A, /obj/structure/bed) && (B.buckled_mobs.len || B.density))//if it's a bed/chair and is dense or someone is buckled, it will not pass
+	if (istype(A, /obj/structure/bed) && (B.has_buckled_mobs() || B.density))//if it's a bed/chair and is dense or someone is buckled, it will not pass
 		return 0
 
 	if (istype(A, /obj/structure/closet/cardboard))

code/game/objects/structures/transit_tubes/station.dm

@@ -64,13 +64,13 @@
 			if(icon_state == "open")
 				var/mob/living/GM = user.pulling
 				if(user.grab_state >= GRAB_AGGRESSIVE)
-					if(GM.buckled || GM.buckled_mobs.len)
+					if(GM.buckled || GM.has_buckled_mobs())
 						user << "<span class='warning'>[GM] is attached to something!</span>"
 						return
 					for(var/obj/structure/transit_tube_pod/pod in loc)
 						pod.visible_message("<span class='warning'>[user] starts putting [GM] into the [pod]!</span>")
 						if(do_after(user, 15, target = src))
-							if(GM && user.grab_state >= GRAB_AGGRESSIVE && user.pulling == GM && !GM.buckled && !GM.buckled_mobs.len)
+							if(GM && user.grab_state >= GRAB_AGGRESSIVE && user.pulling == GM && !GM.buckled && !GM.has_buckled_mobs())
 								GM.Weaken(5)
 								src.Bumped(GM)
 						break

code/modules/atmospherics/machinery/pipes/heat_exchange/he_pipes.dm

@@ -46,7 +46,7 @@
 
 
 	//heatup/cooldown any mobs buckled to ourselves based on our temperature
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		var/hc = pipe_air.heat_capacity()
 		var/mob/living/heat_source = buckled_mobs[1]
 		//Best guess-estimate of the total bodytemperature of all the mobs, since they share the same environment it's ~ok~ to guess like this
@@ -82,7 +82,7 @@
 			animate(src, color = rgb(h_r, h_g, h_b), time = 20, easing = SINE_EASING)
 
 	//burn any mobs buckled based on temperature
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		var/heat_limit = 1000
 		if(pipe_air.temperature > heat_limit + 1)
 			for(var/m in buckled_mobs)

code/modules/clothing/gloves/color.dm

@@ -19,6 +19,7 @@
 	burn_state = FIRE_PROOF
 
 /obj/item/clothing/gloves/color/fyellow/New()
+	..()
 	siemens_coefficient = pick(0,0.5,0.5,0.5,0.5,0.75,1.5)
 
 /obj/item/clothing/gloves/color/black
@@ -182,6 +183,7 @@
 	item_color = "mime"
 
 /obj/item/clothing/gloves/color/random/New()
+	..()
 	var/list/gloves = list(
 		/obj/item/clothing/gloves/color/orange = 1,
 		/obj/item/clothing/gloves/color/red = 1,

code/modules/events/spacevine.dm

@@ -363,7 +363,7 @@
 			KZ.production = (master.spread_cap / initial(master.spread_cap)) * 50
 	mutations = list()
 	SetOpacity(0)
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		unbuckle_all_mobs(force=1)
 	return ..()
 
@@ -540,7 +540,7 @@
 		SM.on_grow(src)
 
 /obj/effect/spacevine/proc/entangle_mob()
-	if(!buckled_mobs.len && prob(25))
+	if(!has_buckled_mobs() && prob(25))
 		for(var/mob/living/V in src.loc)
 			entangle(V)
 			if(buckled_mobs.len)

code/modules/food_and_drinks/kitchen_machinery/gibber.dm

@@ -102,7 +102,7 @@
 			user << "<span class='danger'>This item is not suitable for the gibber!</span>"
 			return
 		var/mob/living/carbon/C = L
-		if(C.buckled ||C.buckled_mobs.len)
+		if(C.buckled ||C.has_buckled_mobs())
 			user << "<span class='warning'>[C] is attached to something!</span>"
 			return
 		if(C.abiotic(1) && !ignore_clothing)
@@ -112,7 +112,7 @@
 		user.visible_message("<span class='danger'>[user] starts to put [C] into the gibber!</span>")
 		src.add_fingerprint(user)
 		if(do_after(user, gibtime, target = src))
-			if(C && user.pulling == C && !C.buckled && !C.buckled_mobs.len && !occupant)
+			if(C && user.pulling == C && !C.buckled && !C.has_buckled_mobs() && !occupant)
 				user.visible_message("<span class='danger'>[user] stuffs [C] into the gibber!</span>")
 				C.forceMove(src)
 				occupant = C

code/modules/food_and_drinks/kitchen_machinery/monkeyrecycler.dm

@@ -72,7 +72,7 @@
 	if(target.stat == 0)
 		user << "<span class='warning'>The monkey is struggling far too much to put it in the recycler.</span>"
 		return
-	if(target.buckled || target.buckled_mobs.len)
+	if(target.buckled || target.has_buckled_mobs())
 		user << "<span class='warning'>The monkey is attached to something.</span>"
 		return
 	qdel(target)

code/modules/mining/ores_coins.dm

@@ -233,6 +233,7 @@
 			qdel(src)
 
 /obj/item/weapon/ore/New()
+	..()
 	pixel_x = rand(0,16)-8
 	pixel_y = rand(0,8)-8
 
@@ -259,6 +260,7 @@
 	var/value = 1
 
 /obj/item/weapon/coin/New()
+	..()
 	pixel_x = rand(0,16)-8
 	pixel_y = rand(0,8)-8
 

code/modules/mob/living/living.dm

@@ -121,7 +121,7 @@ Sorry Giacom. Please don't be mad :(
 	if(moving_diagonally)//no mob swap during diagonal moves.
 		return 1
 
-	if(!M.buckled && !M.buckled_mobs.len)
+	if(!M.buckled && !M.has_buckled_mobs())
 		var/mob_swap
 		//the puller can always swap with its victim if on grab intent
 		if(M.pulledby == src && a_intent == "grab")

code/modules/mob/living/simple_animal/bot/mulebot.dm

@@ -357,7 +357,7 @@ var/global/mulebot_count = 0
 
 	if(isobj(AM))
 		var/obj/O = AM
-		if(O.buckled_mobs.len || (locate(/mob) in AM)) //can't load non crates objects with mobs buckled to it or inside it.
+		if(O.has_buckled_mobs() || (locate(/mob) in AM)) //can't load non crates objects with mobs buckled to it or inside it.
 			buzz(SIGH)
 			return
 

code/modules/mob/living/simple_animal/parrot.dm

@@ -811,7 +811,7 @@
 
 	if(icon_state == "parrot_fly")
 		for(var/mob/living/carbon/human/H in view(src,1))
-			if(H.buckled_mobs.len >= H.max_buckled_mobs) //Already has a parrot, or is being eaten by a slime
+			if(H.has_buckled_mobs() && H.buckled_mobs.len >= H.max_buckled_mobs) //Already has a parrot, or is being eaten by a slime
 				continue
 			perch_on_human(H)
 			return

code/modules/mob/living/ventcrawling.dm

@@ -15,7 +15,7 @@ var/list/ventcrawl_machinery = list(/obj/machinery/atmospherics/components/unary
 	if(restrained())
 		src << "You can't vent crawl while you're restrained!"
 		return
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		src << "You can't vent crawl with others creatures on you!"
 		return
 	if(buckled)

code/modules/mob/mob.dm

@@ -25,6 +25,7 @@ var/next_mob_id = 0
 	..()
 
 /atom/proc/prepare_huds()
+	hud_list = list()
 	for(var/hud in hud_possible)
 		var/image/I = image('icons/mob/hud.dmi', src, "")
 		I.appearance_flags = RESET_COLOR

code/modules/recycling/disposal-unit.dm

@@ -120,7 +120,7 @@
 		return
 	if(!istype(user.loc, /turf/)) //No magically doing it from inside closets
 		return
-	if(target.buckled || target.buckled_mobs.len)
+	if(target.buckled || target.has_buckled_mobs())
 		return
 	if(target.mob_size > MOB_SIZE_HUMAN)
 		user << "<span class='warning'>[target] doesn't fit inside [src]!</span>"

code/modules/research/experimentor.dm

@@ -588,6 +588,7 @@
 	var/cooldown
 
 /obj/item/weapon/relic/New()
+	..()
 	icon_state = pick("shock_kit","armor-igniter-analyzer","infra-igniter0","infra-igniter1","radio-multitool","prox-radio1","radio-radio","timer-multitool0","radio-igniter-tank")
 	realName = "[pick("broken","twisted","spun","improved","silly","regular","badly made")] [pick("device","object","toy","illegal tech","weapon")]"
 

code/modules/research/stock_parts.dm

@@ -71,6 +71,7 @@
 	var/rating = 1
 
 /obj/item/weapon/stock_parts/New()
+	..()
 	src.pixel_x = rand(-5, 5)
 	src.pixel_y = rand(-5, 5)
 

code/modules/spells/spell_types/demon.dm

@@ -145,7 +145,7 @@
 		src.ExtinguishMob()
 		if(buckled)
 			buckled.unbuckle_mob(src,force=1)
-		if(buckled_mobs.len)
+		if(has_buckled_mobs())
 			unbuckle_all_mobs(force=1)
 		if(pulledby)
 			pulledby.stop_pulling()

code/modules/spells/spell_types/ethereal_jaunt.dm

@@ -35,7 +35,7 @@
 			if(target.pulledby)
 				target.pulledby.stop_pulling()
 			target.stop_pulling()
-			if(target.buckled_mobs.len)
+			if(target.has_buckled_mobs())
 				target.unbuckle_all_mobs(force=1)
 			jaunt_disappear(animation, target)
 			target.loc = holder

code/modules/spells/spell_types/turf_teleport.dm

@@ -40,7 +40,7 @@
 		if(!target.Move(picked))
 			if(target.buckled)
 				target.buckled.unbuckle_mob(target,force=1)
-			if(target.buckled_mobs.len)
+			if(target.has_buckled_mobs())
 				target.unbuckle_all_mobs(force=1)
 			target.loc = picked
 			playsound(get_turf(user), sound2, 50,1)

code/modules/vehicles/atv.dm

@@ -18,7 +18,7 @@
 
 
 obj/vehicle/atv/post_buckle_mob(mob/living/M)
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		overlays += atvcover
 	else
 		overlays -= atvcover

code/modules/vehicles/pimpin_ride.dm

@@ -10,7 +10,7 @@
 
 /obj/vehicle/janicart/handle_vehicle_offsets()
 	..()
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		for(var/m in buckled_mobs)
 			var/mob/living/buckled_mob = m
 			switch(buckled_mob.dir)

code/modules/vehicles/scooter.dm

@@ -21,7 +21,7 @@
 
 /obj/vehicle/scooter/handle_vehicle_offsets()
 	..()
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		for(var/m in buckled_mobs)
 			var/mob/living/buckled_mob = m
 			switch(buckled_mob.dir)
@@ -46,14 +46,14 @@
 	density = 0
 
 /obj/vehicle/scooter/skateboard/post_buckle_mob(mob/living/M)//allows skateboards to be non-dense but still allows 2 skateboarders to collide with each other
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		density = 1
 	else
 		density = 0
 
 /obj/vehicle/scooter/skateboard/Bump(atom/A)
 	..()
-	if(A.density && buckled_mobs.len)
+	if(A.density && has_buckled_mobs())
 		var/mob/living/carbon/H = buckled_mobs[1]
 		var/atom/throw_target = get_edge_target_turf(H, pick(cardinal))
 		unbuckle_mob(H)

code/modules/vehicles/speedbike.dm

@@ -26,7 +26,7 @@
 	dir = move_dir
 
 /obj/vehicle/space/speedbike/Move(newloc,move_dir)
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		PoolOrNew(/obj/effect/overlay/temp/speedbike_trail,list(loc,move_dir))
 	. = ..()
 
@@ -40,7 +40,7 @@
 			pixel_y = 0
 
 /obj/vehicle/space/speedbike/handle_vehicle_offsets()
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		for(var/m in buckled_mobs)
 			var/mob/living/buckled_mob = m
 			buckled_mob.dir = dir

code/modules/vehicles/vehicle.dm

@@ -36,7 +36,7 @@
 //if they differ between directions, otherwise use the
 //generic variables
 /obj/vehicle/proc/handle_vehicle_offsets()
-	if(buckled_mobs.len)
+	if(has_buckled_mobs())
 		for(var/m in buckled_mobs)
 			var/mob/living/buckled_mob = m
 			buckled_mob.dir = dir
@@ -123,7 +123,7 @@
 /obj/vehicle/Bump(atom/movable/M)
 	. = ..()
 	if(auto_door_open)
-		if(istype(M, /obj/machinery/door) && buckled_mobs.len)
+		if(istype(M, /obj/machinery/door) && has_buckled_mobs())
 			for(var/m in buckled_mobs)
 				M.Bumped(m)