(svn r22451) -Codechange: Test for bridges and tunnels during the first pass only while terraforming (HackaLittleBit)

src/terraform_cmd.cpp

@@ -308,6 +308,7 @@ CommandCost CmdTerraformLand(TileIndex tile, DoCommandFlag flags, uint32 p1, uin
 			if (z_E > z_min) tileh |= SLOPE_E;
 			if (z_N > z_min) tileh |= SLOPE_N;
 
+			if (pass == 0) {
 				/* Check if bridge would take damage */
 				if (direction == 1 && MayHaveBridgeAbove(tile) && IsBridgeAbove(tile) &&
 						GetBridgeHeight(GetSouthernBridgeEnd(tile)) <= z_max * TILE_HEIGHT) {
@@ -319,6 +320,7 @@ CommandCost CmdTerraformLand(TileIndex tile, DoCommandFlag flags, uint32 p1, uin
 					_terraform_err_tile = tile; // highlight the tile above the tunnel
 					return_cmd_error(STR_ERROR_EXCAVATION_WOULD_DAMAGE);
 				}
+			}
 
 			/* Is the tile already cleared? */
 			const ClearedObjectArea *coa = FindClearedObject(tile);