(svn r10904) -Fix: When using a temporary industry, make sure you do not clear some unreachable tiles upon its destruction.

-Codechange: do not perform something that by all means will not change. A zero offset is really meaningless...

1 files changed, 2 insertions, 1 deletions

diff --git a/src/newgrf_industrytiles.cpp b/src/newgrf_industrytiles.cpp
index b81d71161..f3391c214 100644
--- a/src/newgrf_industrytiles.cpp
+++ b/src/newgrf_industrytiles.cpp
@@ -35,7 +35,7 @@ uint32 GetNearbyIndustryTileInformation(byte parameter, TileIndex tile, Industry
 	byte tile_type;
 	bool is_same_industry;
 
-	tile = GetNearbyTile(parameter, tile);
+	if (parameter != 0) tile = GetNearbyTile(parameter, tile); // only perform if it is required
 	is_same_industry = (IsTileType(tile, MP_INDUSTRY) && GetIndustryIndex(tile) == index);
 	tile_type = GetTerrainType(tile) << 2 | (IsTileType(tile, MP_WATER) ? 1 : 0) << 1 | (is_same_industry ? 1 : 0);
 
@@ -236,6 +236,7 @@ bool PerformIndustryTileSlopeCheck(TileIndex tile, const IndustryTileSpec *its,
 {
 	Industry ind;
 	ind.xy = 0;
+	ind.width = 0;
 	ind.type = type;
 
 	uint16 callback_res = GetIndustryTileCallback(CBID_INDTILE_SHAPE_CHECK, 0, 0, gfx, &ind, tile);