Update turf.dm

preventing space being made and immediately changed to open space

code/game/turfs/turf.dm

@@ -200,6 +200,20 @@
 	if (!N)
 		return
 
+///// Z-Level Stuff ///// This makes sure that turfs are not changed to space when one side is part of a zone
+	if(N == /turf/space)
+		var/turf/controler = locate(1, 1, src.z)
+		for(var/obj/effect/landmark/zcontroler/c in controler)
+			if(c.down)
+				var/turf/below = locate(src.x, src.y, c.down_target)
+				if((below.zone || zone) && !istype(below, /turf/space)) // dont make open space into space, its pointless and makes people drop out of the station
+					var/turf/W = src.ChangeTurf(/turf/simulated/floor/open)
+					var/list/temp = list()
+					temp += W
+					c.add(temp,3,1) // report the new open space to the zcontroler
+					return W
+///// Z-Level Stuff
+
 	var/old_lumcount = lighting_lumcount - initial(lighting_lumcount)
 
 	if(ispath(N, /turf/simulated/floor))
@@ -337,4 +351,4 @@
 		if(!t.density)
 			if(!LinkBlocked(src, t) && !TurfBlockedNonWindow(t))
 				L.Add(t)
-	return L
+	return L