Bools and returns super-pr (#53221)

Replaces like 70-80% of 0 and such, as a side effect cleaned up a bunch of returns
Edit: Most left out ones are in mecha which should be done in mecha refactor already
Oh my look how clean it is

Co-authored-by: TiviPlus <TiviPlus>
Co-authored-by: Couls <coul422@gmail.com>

code/modules/projectiles/boxes_magazines/internal/revolver.dm

@@ -15,7 +15,7 @@
 	ammo_type = /obj/item/ammo_casing/a357
 	caliber = "357"
 	max_ammo = 6
-	multiload = 0
+	multiload = FALSE
 
 /obj/item/ammo_box/magazine/internal/rus357/Initialize()
 	stored_ammo += new ammo_type(src)

code/modules/projectiles/boxes_magazines/internal/rifle.dm

@@ -4,7 +4,7 @@
 	ammo_type = /obj/item/ammo_casing/a762
 	caliber = "a762"
 	max_ammo = 5
-	multiload = 1
+	multiload = TRUE
 
 /obj/item/ammo_box/magazine/internal/boltaction/enchanted
 	max_ammo = 1

code/modules/projectiles/boxes_magazines/internal/shotgun.dm

@@ -3,7 +3,7 @@
 	ammo_type = /obj/item/ammo_casing/shotgun/beanbag
 	caliber = "shotgun"
 	max_ammo = 4
-	multiload = 0
+	multiload = FALSE
 
 /obj/item/ammo_box/magazine/internal/shot/tube
 	name = "dual feed shotgun internal tube"
@@ -17,7 +17,7 @@
 	name = "combat shotgun internal magazine"
 	ammo_type = /obj/item/ammo_casing/shotgun/buckshot
 	max_ammo = 6
-	
+
 /obj/item/ammo_box/magazine/internal/shot/dual
 	name = "double-barrel shotgun internal magazine"
 	max_ammo = 2

code/modules/projectiles/guns/ballistic/laser_gatling.dm

@@ -12,7 +12,7 @@
 	slot_flags = ITEM_SLOT_BACK
 	w_class = WEIGHT_CLASS_HUGE
 	var/obj/item/gun/ballistic/minigun/gun
-	var/armed = 0 //whether the gun is attached, 0 is attached, 1 is the gun is wielded.
+	var/armed = FALSE //whether the gun is attached, FALSE is attached, TRUE is the gun is wielded.
 	var/overheat = 0
 	var/overheat_max = 40
 	var/heat_diffusion = 1
@@ -34,9 +34,9 @@
 	if(src.loc == user)
 		if(!armed)
 			if(user.get_item_by_slot(ITEM_SLOT_BACK) == src)
-				armed = 1
+				armed = TRUE
 				if(!user.put_in_hands(gun))
-					armed = 0
+					armed = FALSE
 					to_chat(user, "<span class='warning'>You need a free hand to hold the gun!</span>")
 					return
 				update_icon()
@@ -84,7 +84,7 @@
 	if(!gun)
 		gun = new(src)
 	gun.forceMove(src)
-	armed = 0
+	armed = FALSE
 	if(user)
 		to_chat(user, "<span class='notice'>You attach the [gun.name] to the [name].</span>")
 	else
@@ -127,7 +127,7 @@
 	return
 
 /obj/item/gun/ballistic/minigun/dropped(mob/user)
-	SHOULD_CALL_PARENT(0)
+	SHOULD_CALL_PARENT(FALSE)
 	if(ammo_pack)
 		ammo_pack.attach_gun(user)
 	else

code/modules/projectiles/guns/ballistic/pistol.dm

@@ -87,7 +87,7 @@
 	icon_state = "flatgun"
 
 /obj/item/gun/ballistic/automatic/pistol/stickman/pickup(mob/living/user)
-	SHOULD_CALL_PARENT(0)
+	SHOULD_CALL_PARENT(FALSE)
 	to_chat(user, "<span class='notice'>As you try to pick up [src], it slips out of your grip..</span>")
 	if(prob(50))
 		to_chat(user, "<span class='notice'>..and vanishes from your vision! Where the hell did it go?</span>")

code/modules/projectiles/guns/ballistic/revolver.dm

@@ -91,7 +91,7 @@
 						"The Peacemaker" = "detective_peacemaker",
 						"Black Panther" = "detective_panther"
 						)
-	
+
 	/// Used to avoid some redundancy on a revolver loaded with 357 regarding misfiring while being wrenched.
 	var/skip_357_missfire_check = FALSE
 
@@ -250,7 +250,7 @@
 	user.visible_message("<span class='danger'>[user.name]'s soul is captured by \the [src]!</span>", "<span class='userdanger'>You've lost the gamble! Your soul is forfeit!</span>")
 
 /obj/item/gun/ballistic/revolver/reverse //Fires directly at its user... unless the user is a clown, of course.
-	clumsy_check = 0
+	clumsy_check = FALSE
 
 /obj/item/gun/ballistic/revolver/reverse/can_trigger_gun(mob/living/user)
 	if((HAS_TRAIT(user, TRAIT_CLUMSY)) || (user.mind && user.mind.assigned_role == "Clown"))

code/modules/projectiles/guns/ballistic/shotgun.dm

@@ -227,7 +227,7 @@
 	. = ..()
 	if(. && slung) //sawing off the gun removes the sling
 		new /obj/item/stack/cable_coil(get_turf(src), 10)
-		slung = 0
+		slung = FALSE
 		update_icon()
 		lefthand_file = 'icons/mob/inhands/weapons/64x_guns_left.dmi'
 		righthand_file = 'icons/mob/inhands/weapons/64x_guns_right.dmi'

code/modules/projectiles/guns/ballistic/toy.dm

@@ -10,7 +10,7 @@
 	throwforce = 0
 	burst_size = 3
 	can_suppress = TRUE
-	clumsy_check = 0
+	clumsy_check = FALSE
 	item_flags = NONE
 	casing_ejector = FALSE
 

code/modules/projectiles/guns/energy/laser.dm

@@ -13,7 +13,7 @@
 	name = "practice laser gun"
 	desc = "A modified version of the basic laser gun, this one fires less concentrated energy bolts designed for target practice."
 	ammo_type = list(/obj/item/ammo_casing/energy/laser/practice)
-	clumsy_check = 0
+	clumsy_check = FALSE
 	item_flags = NONE
 
 /obj/item/gun/energy/laser/retro

code/modules/projectiles/guns/misc/medbeam.dm

@@ -10,7 +10,7 @@
 	var/last_check = 0
 	var/check_delay = 10 //Check los as often as possible, max resolution is SSobj tick though
 	var/max_range = 8
-	var/active = 0
+	var/active = FALSE
 	var/datum/beam/current_beam = null
 	var/mounted = 0 //Denotes if this is a handheld or mounted version
 
@@ -37,7 +37,7 @@
 	if(active)
 		qdel(current_beam)
 		current_beam = null
-		active = 0
+		active = FALSE
 		on_beam_release(current_target)
 	current_target = null
 
@@ -87,7 +87,7 @@
 	if(mounted)
 		user_turf = get_turf(user)
 	else if(!istype(user_turf))
-		return 0
+		return FALSE
 	var/obj/dummy = new(user_turf)
 	dummy.pass_flags |= PASSTABLE|PASSGLASS|PASSGRILLE //Grille/Glass so it can be used through common windows
 	for(var/turf/turf in getline(user_turf,target))
@@ -95,18 +95,18 @@
 			continue //Mechs are dense and thus fail the check
 		if(turf.density)
 			qdel(dummy)
-			return 0
+			return FALSE
 		for(var/atom/movable/AM in turf)
 			if(!AM.CanPass(dummy,turf,1))
 				qdel(dummy)
-				return 0
+				return FALSE
 		for(var/obj/effect/ebeam/medical/B in turf)// Don't cross the str-beams!
 			if(B.owner.origin != current_beam.origin)
 				explosion(B.loc,0,3,5,8)
 				qdel(dummy)
-				return 0
+				return FALSE
 	qdel(dummy)
-	return 1
+	return TRUE
 
 /obj/item/gun/medbeam/proc/on_beam_hit(mob/living/target)
 	return
@@ -128,7 +128,7 @@
 
 //////////////////////////////Mech Version///////////////////////////////
 /obj/item/gun/medbeam/mech
-	mounted = 1
+	mounted = TRUE
 
 /obj/item/gun/medbeam/mech/Initialize()
 	. = ..()

code/modules/projectiles/guns/misc/syringe_gun.dm

@@ -8,7 +8,7 @@
 	throw_range = 7
 	force = 4
 	custom_materials = list(/datum/material/iron=2000)
-	clumsy_check = 0
+	clumsy_check = FALSE
 	fire_sound = 'sound/items/syringeproj.ogg'
 	var/load_sound = 'sound/weapons/gun/shotgun/insert_shell.ogg'
 	var/list/syringes = list()
@@ -44,7 +44,7 @@
 /obj/item/gun/syringe/attack_self(mob/living/user)
 	if(!syringes.len)
 		to_chat(user, "<span class='warning'>[src] is empty!</span>")
-		return 0
+		return FALSE
 
 	var/obj/item/reagent_containers/syringe/S = syringes[syringes.len]
 

code/modules/projectiles/pins.dm

@@ -10,9 +10,9 @@
 	attack_verb_continuous = list("pokes")
 	attack_verb_simple = list("poke")
 	var/fail_message = "<span class='warning'>INVALID USER.</span>"
-	var/selfdestruct = 0 // Explode when user check is failed.
-	var/force_replace = 0 // Can forcefully replace other pins.
-	var/pin_removeable = 0 // Can be replaced by any pin.
+	var/selfdestruct = FALSE // Explode when user check is failed.
+	var/force_replace = FALSE // Can forcefully replace other pins.
+	var/pin_removeable = FALSE // Can be replaced by any pin.
 	var/obj/item/gun/gun
 
 /obj/item/firing_pin/New(newloc)