# HG changeset patch
# User Yexo <Yexo@openttd.org>
# Date 1233245686 0
# Node ID ae9053a8b2113543e569990c61cba46dd140b40e
# Parent  0506bfc8ab3905ba5b91df90be0b31d1a7700c7f
(svn r15295) -Fix [FS#2591] (r15190): Towns tried to build roads outside the map.

diff --git a/src/road.cpp b/src/road.cpp
--- a/src/road.cpp
+++ b/src/road.cpp
@@ -26,6 +26,7 @@
 
 RoadBits CleanUpRoadBits(const TileIndex tile, RoadBits org_rb)
 {
+	if (!IsValidTile(tile)) return ROAD_NONE;
 	for (DiagDirection dir = DIAGDIR_BEGIN; dir < DIAGDIR_END; dir++) {
 		const TileIndex neighbor_tile = TileAddByDiagDir(tile, dir);