[MIRROR] some more grep checks (#11414)

Co-authored-by: Kashargul <144968721+Kashargul@users.noreply.github.com>

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

@@ -73,7 +73,7 @@
 	update_icon()
 
 /obj/structure/closet/Destroy()
-	qdel_null(door_obj)
+	QDEL_NULL(door_obj)
 	closet_appearance = null
 	return ..()
 

code/game/objects/structures/droppod.dm

@@ -18,7 +18,11 @@
 	if(A)
 		A.forceMove(src) // helo
 		podfall(auto_open)
-		air = new(1000)
+		air = new
+
+/obj/structure/drop_pod/Destroy()
+	. = ..()
+	QDEL_NULL(air)
 
 /obj/structure/drop_pod/proc/podfall(auto_open)
 	var/turf/T = get_turf(src)
@@ -101,7 +105,7 @@
 	for(var/atom/movable/AM in src)
 		AM.forceMove(loc)
 		AM.set_dir(SOUTH) // cus
-	qdel_null(air)
+	QDEL_NULL(air)
 	finished = TRUE
 
 /obj/structure/drop_pod/attack_hand(mob/living/user)

code/game/objects/structures/ghost_pods/ghost_pods.dm

@@ -44,7 +44,7 @@
 		if(delay_to_try_again)
 			addtimer(CALLBACK(src, PROC_REF(trigger)), delay_to_try_again)
 	UnregisterSignal(Q, COMSIG_GHOST_QUERY_COMPLETE)
-	qdel_null(Q) //get rid of the query
+	QDEL_NULL(Q) //get rid of the query
 	if(deletion_candidate)
 		qdel(src)
 

code/game/objects/structures/morgue.dm

@@ -227,7 +227,7 @@ GLOBAL_LIST_BOILERPLATE(all_crematoriums, /obj/structure/morgue/crematorium)
 			if (!( A.anchored ))
 				A.forceMove(src)
 		playsound(src, 'sound/items/Deconstruct.ogg', 50, 1)
-		qdel_null(connected)
+		QDEL_NULL(connected)
 	else if (src.locked == 0)
 		playsound(src, 'sound/items/Deconstruct.ogg', 50, 1)
 		src.connected = new /obj/structure/m_tray/c_tray( src.loc )
@@ -241,7 +241,7 @@ GLOBAL_LIST_BOILERPLATE(all_crematoriums, /obj/structure/morgue/crematorium)
 				A.forceMove(src.connected.loc)
 			src.connected.icon_state = "cremat"
 		else
-			qdel_null(connected)
+			QDEL_NULL(connected)
 	src.add_fingerprint(user)
 	update()