From bccaea11c9d4c05fad28fec963380624b33e0feb Mon Sep 17 00:00:00 2001
From: SkyMarshal <skymarshal1729@gmail.com>
Date: Sat, 11 Aug 2012 01:05:14 -0700
Subject: [PATCH] Some more minor improvements.

---
 code/ZAS/Functions.dm | 41 +++++++++++++++++++++--------------------
 1 file changed, 21 insertions(+), 20 deletions(-)

diff --git a/code/ZAS/Functions.dm b/code/ZAS/Functions.dm
index 0251e787dca..6d40eec83ed 100644
--- a/code/ZAS/Functions.dm
+++ b/code/ZAS/Functions.dm
@@ -18,7 +18,7 @@ proc/FloodFill(turf/start)
 				for(var/d in cardinal)
 					var/turf/O = get_step(T,d)
 					//Simple pass check.
-					if(istype(O) && !(O in open || O in closed) && O.ZCanPass(T))
+					if(istype(O) && !(O in open || O in closed || O in doors) && O.ZCanPass(T))
 						open += O
 			else
 				doors |= T
@@ -28,28 +28,29 @@ proc/FloodFill(turf/start)
 			open -= T
 			closed += T
 
-	for(var/turf/T in doors)
-		var/force_connection = 1
-		var/turf/simulated/O = get_step(T,NORTH)
-		if(O in closed)
-			closed += T
-			continue
-		else if(T.ZCanPass(O) && istype(O))
-			force_connection = 0
-
-		O = get_step(T,WEST)
-		if(O in closed)
-			closed += T
-			continue
-		else if(force_connection && T.ZCanPass(O) && istype(O))
-			force_connection = 0
-
-		if(force_connection)
-			O = get_step(T,SOUTH)
+	if(closed.len)
+		for(var/turf/T in doors)
+			var/force_connection = 1
+			var/turf/simulated/O = get_step(T,NORTH)
 			if(O in closed)
 				closed += T
-			else if((!T.ZCanPass(O) || !istype(O)) && get_step(T,EAST) in closed)
+				continue
+			else if(T.ZCanPass(O) && istype(O))
+				force_connection = 0
+
+			O = get_step(T,WEST)
+			if(O in closed)
 				closed += T
+				continue
+			else if(force_connection && T.ZCanPass(O) && istype(O))
+				force_connection = 0
+
+			if(force_connection)
+				O = get_step(T,SOUTH)
+				if(O in closed)
+					closed += T
+				else if((!T.ZCanPass(O) || !istype(O)) && get_step(T,EAST) in closed)
+					closed += T
 
 	return closed