Fix for ChangeTurf and update_air_properties not handling geometry changes correctly.

Signed-off-by: Mloc <colmohici@gmail.com>

code/ZAS/ZAS_Turfs.dm

@@ -125,7 +125,6 @@
 		return ..()
 
 /turf/simulated/proc/update_air_properties()
-	var/air_directions_archived = air_check_directions
 	air_check_directions = 0
 
 	for(var/direction in cardinal)
@@ -165,14 +164,12 @@
 			var/turf/T = get_step(src,direction)
 			if(!istype(T))
 				continue
-
 			//I can connect to air in this direction
-			if(air_check_directions & direction && !(air_directions_archived & direction))
-
+			if(air_check_directions & direction)
 				ZConnect(src,T)
 
 			//Something like a wall was built, changing the geometry.
-			else if(!(air_check_directions & direction) && air_directions_archived & direction)
+			else if(!(air_check_directions & direction))
 				var/turf/NT = get_step(T, direction)
 
 				//If the tile is in our own zone, and we cannot connect to it, better rebuild.

code/game/turfs/turf.dm

@@ -214,6 +214,13 @@
 	var/old_lumcount = lighting_lumcount - initial(lighting_lumcount)
 
 	if(ispath(N, /turf/simulated/floor))
+		//if the old turf had a zone, connect the new turf to it as well - Cael
+		//Adjusted by SkyMarshal 5/10/13 - The air master will handle the addition of the new turf.
+		if(zone)
+			zone.RemoveTurf(src)
+			if(!zone.CheckStatus())
+				zone.SetStatus(ZONE_ACTIVE)
+
 		var/turf/simulated/W = new N( locate(src.x, src.y, src.z) )
 		//W.Assimilate_Air()
 
@@ -225,13 +232,6 @@
 		if (istype(W,/turf/simulated/floor))
 			W.RemoveLattice()
 
-		//if the old turf had a zone, connect the new turf to it as well - Cael
-		//Adjusted by SkyMarshal 5/10/13 - The air master will handle the addition of the new turf.
-		if(zone)
-			zone.RemoveTurf(src)
-			if(!zone.CheckStatus())
-				zone.SetStatus(ZONE_ACTIVE)
-
 		if(air_master)
 			air_master.AddTurfToUpdate(src)
 
@@ -239,17 +239,17 @@
 		return W
 
 	else
+		if(zone)
+			zone.RemoveTurf(src)
+			if(!zone.CheckStatus())
+				zone.SetStatus(ZONE_ACTIVE)
+
 		var/turf/W = new N( locate(src.x, src.y, src.z) )
 		W.lighting_lumcount += old_lumcount
 		if(old_lumcount != W.lighting_lumcount)
 			W.lighting_changed = 1
 			lighting_controller.changed_turfs += W
 
-		if(zone)
-			zone.RemoveTurf(src)
-			if(!zone.CheckStatus())
-				zone.SetStatus(ZONE_ACTIVE)
-
 		if(air_master)
 			air_master.AddTurfToUpdate(src)