static inline Owner GetCanalOwner(TileIndex t)
{
	if (!HasTileWaterGround(t)) return GetTileOwner(t);

	Owner o = (Owner)(GB(_me[t].m6, 0, 2) | (GB(_me[t].m6, 6, 2) << 2));

	/* Canals don't need OWNER_TOWN, and remapping OWNER_NONE
	* to OWNER_TOWN makes it use one bit less. */
	return o == OWNER_TOWN ? OWNER_NONE : o;
}