Modular computers QDEL and refdrops (#17655)

* Atomization

* sdfasdf

---------

Co-authored-by: FluffyGhost <FluffyGhost>

code/modules/modular_computers/hardware/card_slot.dm

@@ -22,7 +22,10 @@
 	if(parent_computer?.card_slot == src)
 		parent_computer.card_slot = null
 	if(stored_card)
-		stored_card.forceMove(get_turf(parent_computer))
+		stored_card.forceMove(get_turf(parent_computer)) //Why the hell are we not QDEL'ing the stored card if we're being destroyed? I don't know, but something might rely on it, hence...
+		stored_card = null								//the conservative approach is to just null the reference and hope for the best
+
+	QDEL_NULL(stored_item)
 	parent_computer = null
 	return ..()
 
@@ -49,4 +52,4 @@
 
 	if(parent_computer)
 		parent_computer.verbs -= /obj/item/modular_computer/proc/eject_id
-		parent_computer.name = parent_computer.initial_name
+		parent_computer.name = parent_computer.initial_name

code/modules/modular_computers/hardware/hard_drive.dm

@@ -142,15 +142,21 @@
 		return null
 	if(!stored_files)
 		return null
+
 	for(var/datum/computer_file/F in stored_files)
+
+		if(QDELETED(F))
+			continue
+
 		if(F.filename == filename)
 			return F
+
 	return null
 
 /obj/item/computer_hardware/hard_drive/Destroy()
 	if(parent_computer?.hard_drive == src)
 		parent_computer.hard_drive = null
-	stored_files = null
+	QDEL_NULL_LIST(stored_files)
 	return ..()
 
 /obj/item/computer_hardware/hard_drive/Initialize(mapload)