[MIRROR] Add code improvements from BeeStation-Hornet by ike709 (#5548)

* Add code improvements from BeeStation-Hornet by ike709 (#58922)

Co-authored-by: celotajstg <celotajstg@ users.noreply.github.com>

* Add code improvements from BeeStation-Hornet by ike709

Co-authored-by: Celotajs <81999976+celotajstg@users.noreply.github.com>
Co-authored-by: celotajstg <celotajstg@ users.noreply.github.com>

code/__HELPERS/roundend.dm

@@ -181,9 +181,9 @@
 
 ///Handles random hardcore point rewarding if it applies.
 /datum/controller/subsystem/ticker/proc/HandleRandomHardcoreScore(client/player_client)
-	if(!ishuman(player_client.mob))
+	if(!ishuman(player_client?.mob))
 		return FALSE
-	var/mob/living/carbon/human/human_mob = player_client.mob
+	var/mob/living/carbon/human/human_mob = player_client?.mob
 	if(!human_mob.hardcore_survival_score) ///no score no glory
 		return FALSE
 
@@ -197,9 +197,9 @@
 					didthegamerwin = FALSE
 		if(!didthegamerwin)
 			return FALSE
-		player_client.give_award(/datum/award/score/hardcore_random, human_mob, round(human_mob.hardcore_survival_score * 2))
+		player_client?.give_award(/datum/award/score/hardcore_random, human_mob, round(human_mob.hardcore_survival_score * 2))
 	else if(human_mob.onCentCom())
-		player_client.give_award(/datum/award/score/hardcore_random, human_mob, round(human_mob.hardcore_survival_score))
+		player_client?.give_award(/datum/award/score/hardcore_random, human_mob, round(human_mob.hardcore_survival_score))
 
 
 /datum/controller/subsystem/ticker/proc/declare_completion()
@@ -218,11 +218,11 @@
 		speed_round = TRUE
 
 	for(var/client/C in GLOB.clients)
-		if(!C.credits)
-			C.RollCredits()
-		C.playtitlemusic(40)
+		if(!C?.credits)
+			C?.RollCredits()
+		C?.playtitlemusic(40)
 		if(speed_round)
-			C.give_award(/datum/award/achievement/misc/speed_round, C.mob)
+			C?.give_award(/datum/award/achievement/misc/speed_round, C?.mob)
 		HandleRandomHardcoreScore(C)
 
 	var/popcount = gather_roundend_feedback()

code/game/machinery/cryopod.dm

@@ -285,13 +285,13 @@ GLOBAL_LIST_EMPTY(cryopod_computers)
 		crew_member["job"] = "N/A"
 	// Delete them from datacore.
 	var/announce_rank = null
-	for(var/datum/data/record/medical_record in GLOB.data_core.medical)
+	for(var/datum/data/record/medical_record as anything in GLOB.data_core.medical)
 		if(medical_record.fields["name"] == mob_occupant.real_name)
 			qdel(medical_record)
-	for(var/datum/data/record/security_record in GLOB.data_core.security)
+	for(var/datum/data/record/security_record as anything in GLOB.data_core.security)
 		if(security_record.fields["name"] == mob_occupant.real_name)
 			qdel(security_record)
-	for(var/datum/data/record/general_record in GLOB.data_core.general)
+	for(var/datum/data/record/general_record as anything in GLOB.data_core.general)
 		if(general_record.fields["name"] == mob_occupant.real_name)
 			announce_rank = general_record.fields["rank"]
 			qdel(general_record)

code/game/objects/effects/proximity.dm

@@ -118,6 +118,7 @@
 	return
 
 /obj/effect/abstract/proximity_checker/Destroy()
+	monitor.checkers -= src
 	monitor = null
 	return ..()
 

code/game/objects/items/devices/radio/radio.dm

@@ -253,7 +253,7 @@
 	var/turf/position = get_turf(src)
 	for(var/obj/item/jammer/jammer in GLOB.active_jammers)
 		var/turf/jammer_turf = get_turf(jammer)
-		if(position.z == jammer_turf.z && (get_dist(position, jammer_turf) <= jammer.range))
+		if(position?.z == jammer_turf.z && (get_dist(position, jammer_turf) <= jammer.range))
 			return
 
 	// Determine the identity information which will be attached to the signal.

code/game/objects/items/robot/robot_items.dm

@@ -796,8 +796,7 @@
 	RegisterSignal(loc.loc, COMSIG_BORG_SAFE_DECONSTRUCT, .proc/safedecon)
 
 /obj/item/borg/apparatus/Destroy()
-	if(stored)
-		qdel(stored)
+	QDEL_NULL(stored)
 	. = ..()
 
 ///If we're safely deconstructed, we put the item neatly onto the ground, rather than deleting it.
@@ -894,7 +893,7 @@
 	if(stored)
 		var/obj/item/reagent_containers/C = stored
 		C.SplashReagents(get_turf(src))
-		qdel(stored)
+	QDEL_NULL(stored)
 	. = ..()
 
 /obj/item/borg/apparatus/beaker/examine()

code/modules/reagents/chemistry/machinery/chem_synthesizer.dm

@@ -57,6 +57,10 @@
 				purity = input
 	update_appearance()
 
+/obj/machinery/chem_dispenser/chem_synthesizer/Destroy()
+	QDEL_NULL(beaker)
+	return ..()
+
 /obj/machinery/chem_dispenser/chem_synthesizer/ui_data(mob/user)
 	. = ..()
 	.["purity"] = purity

code/modules/reagents/chemistry/machinery/reagentgrinder.dm

@@ -45,10 +45,14 @@
 	QDEL_NULL(beaker)
 	update_appearance()
 
-/obj/machinery/reagentgrinder/Destroy()
-	if(beaker)
-		beaker.forceMove(drop_location())
+/obj/machinery/reagentgrinder/deconstruct()
 	drop_all_items()
+	beaker?.forceMove(drop_location())
+	beaker = null
+	return ..()
+
+/obj/machinery/reagentgrinder/Destroy()
+	QDEL_NULL(beaker)
 	return ..()
 
 /obj/machinery/reagentgrinder/contents_explosion(severity, target)