(svn r11308) -Fix (r9315): Change the house id as well as the house spec when using an overridden town building, since the house id is the one that's used to actually build the house.

src/town_cmd.cpp

@@ -1707,7 +1707,10 @@ static void DoBuildTownHouse(Town *t, TileIndex tile)
 			hs = GetHouseSpecs(house);
 
 			if (_loaded_newgrf_features.has_newhouses) {
-				if (hs->override != 0) hs = GetHouseSpecs(hs->override);
+				if (hs->override != 0) {
+					house = hs->override;
+					hs = GetHouseSpecs(house);
+				}
 
 				if ((hs->extra_flags & BUILDING_IS_HISTORICAL) && !_generating_world) continue;