From b17ef7f938808fe972030757921e958793a17943 Mon Sep 17 00:00:00 2001
From: jacob1 <jfu614@gmail.com>
Date: Thu, 29 Aug 2013 20:59:37 -0400
Subject: [PATCH] fix PSTN bug found in save 1299509 (hopefully won't break
 anything)

---
 src/simulation/elements/PSTN.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/simulation/elements/PSTN.cpp b/src/simulation/elements/PSTN.cpp
index 6dda77ffc..998f7a2ba 100644
--- a/src/simulation/elements/PSTN.cpp
+++ b/src/simulation/elements/PSTN.cpp
@@ -167,7 +167,7 @@ int Element_PSTN::update(UPDATE_FUNC_ARGS)
 //#TPT-Directive ElementHeader Element_PSTN static int CanMoveStack(Simulation * sim, int stackX, int stackY, int directionX, int directionY, int maxSize, int amount, bool retract, int block)
 int Element_PSTN::CanMoveStack(Simulation * sim, int stackX, int stackY, int directionX, int directionY, int maxSize, int amount, bool retract, int block)
 {
-	int posX, posY, r, spaces = 0, currentPos = 0;
+	int posX, posY, r, spaces = 0, currentPos = 0, num = 0;
 	if (amount <= 0)
 		return 0;
 	for(posX = stackX, posY = stackY; currentPos < maxSize + amount && currentPos < XRES-1; posX += directionX, posY += directionY) {
@@ -176,7 +176,7 @@ int Element_PSTN::CanMoveStack(Simulation * sim, int stackX, int stackY, int dir
 		}
 		r = sim->pmap[posY][posX];
 		if (sim->IsWallBlocking(posX, posY, 0) || (block && (r&0xFF) == block))
-			return spaces;
+			return num;
 		if(!r) {
 			spaces++;
 			tempParts[currentPos++] = -1;
@@ -186,8 +186,9 @@ int Element_PSTN::CanMoveStack(Simulation * sim, int stackX, int stackY, int dir
 			if(spaces < maxSize && currentPos < maxSize && (!retract || ((r&0xFF) == PT_FRME) && posX == stackX && posY == stackY))
 				tempParts[currentPos++] = r>>8;
 			else
-				return spaces;
+				return num;
 		}
+		num++;
 	}
 	if (spaces)
 		return currentPos;