Partially ports the GLOB system

code/modules/multiz/hoist.dm

@@ -110,7 +110,7 @@
 /obj/structure/hoist/Destroy()
 	if(hoistee)
 		release_hoistee()
-	qdel_null(src.source_hook)
+	QDEL_NULL(src.source_hook)
 	return ..()
 
 /obj/effect/hoist_hook/Destroy()
@@ -139,7 +139,7 @@
 	desc += " It looks broken, and the clamp has retracted back into the hoist. Seems like you'd have to re-deploy it to get it to work again."
 	if(hoistee)
 		release_hoistee()
-	qdel_null(source_hook)
+	QDEL_NULL(source_hook)
 
 /obj/structure/hoist/ex_act(severity)
 	switch(severity)

code/modules/multiz/zshadow.dm

@@ -29,7 +29,7 @@
 	return QDEL_HINT_QUEUE
 
 /mob/Destroy()
-	qdel_null(shadow)
+	QDEL_NULL(shadow)
 	. = ..()
 
 /mob/zshadow/examine(mob/user, distance, infix, suffix)