Lawgiver and random fix (#1658)

Fixes an issue that popped up with obj/randoms, they werent getting sucked into lockers

Also fixes that lawgiver runtime.
The issue that previous fixes miss is that DM casts implicitly and without safety checks. Casting an animal to a human does not result in null. an istype check is needed

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

@@ -27,8 +27,9 @@
 /obj/structure/closet/initialize()
 	..()
 	if(!opened)		// if closed, any item at the crate's loc is put in the contents
-		var/obj/item/I
+		var/obj/I
 		for(I in src.loc)
+			if (!istype(I, /obj/item) && !istype(I, /obj/random))continue
 			if(I.density || I.anchored || I == src) continue
 			I.forceMove(src)
 		// adjust locker size to hold all items with 5 units of free store room