More GC Define Transitions

code/modules/mob/dead/observer/observer.dm

@@ -94,8 +94,7 @@ var/list/image/ghost_darkness_images = list() //this is a list of images for thi
 	following = null
 	if(ghostimage)
 		ghost_darkness_images -= ghostimage
-		qdel(ghostimage)
-		ghostimage = null
+		QDEL_NULL(ghostimage)
 		updateallghostimages()
 	return ..()
 
@@ -642,13 +641,13 @@ This is the proc mobs get to turn into a ghost. Forked from ghostize due to comp
 
 /mob/proc/can_admin_interact()
 	return FALSE
-	
+
 /mob/proc/can_advanced_admin_interact()
 	return FALSE
 
 /mob/dead/observer/can_admin_interact()
 	return check_rights(R_ADMIN, 0, src)
-	
+
 /mob/dead/observer/can_advanced_admin_interact()
 	if(!can_admin_interact())
 		return FALSE
@@ -657,7 +656,7 @@ This is the proc mobs get to turn into a ghost. Forked from ghostize due to comp
 		return TRUE
 
 	return FALSE
-	
+
 /mob/dead/observer/incapacitated()
 	return TRUE
 

code/modules/mob/living/carbon/carbon.dm

@@ -17,10 +17,8 @@
 	med_hud_set_status()
 
 /mob/living/carbon/Destroy()
-	for(var/atom/movable/guts in internal_organs)
-		qdel(guts)
-	for(var/atom/movable/food in stomach_contents)
-		qdel(food)
+	QDEL_LIST(internal_organs)
+	QDEL_LIST(stomach_contents)
 	remove_from_all_data_huds()
 	return ..()
 

code/modules/mob/living/silicon/robot/robot_modules.dm

@@ -32,9 +32,7 @@
 	emag.name = "Placeholder Emag Item"
 
 /obj/item/weapon/robot_module/Destroy()
-	for(var/module in modules)
-		qdel(module)
-	modules.Cut()
+	QDEL_LIST(modules)
 	QDEL_NULL(emag)
 	return ..()