fixes

code/game/objects/objs.dm

@@ -129,7 +129,13 @@
 	return
 
 /mob/proc/unset_machine()
-	src.machine = null
+	if(machine)
+		machine.on_unset_machine(src)
+		machine = null
+
+//called when the user unsets the machine.
+/atom/movable/proc/on_unset_machine(mob/user)
+	return
 
 /mob/proc/set_machine(var/obj/O)
 	if(src.machine)