Function MaybeBarCrossingWithSound

src/train_cmd.cpp:1878–1884

* Bars crossing and plays ding-ding sound if not barred already * @param tile tile with crossing * @pre tile is a rail-road crossing */

 * @pre tile is a rail-road crossing
 */
static inline void MaybeBarCrossingWithSound(TileIndex tile)
{
	if (!IsCrossingBarred(tile)) {
		SetCrossingReservation(tile, true);
		UpdateLevelCrossing(tile, true);
	}
}


/**