// and return if no more road blocks available

		CLRBIT(mask, (block ^ 2));

		if (mask == 0)

			return _grow_town_result;

		// Select a random bit from the blockmask, walk a step

		// and continue the search from there.

		do block = Random() & 3; while (!HASBIT(mask,block));

		tile += ToTileIndexDiff(_roadblock_tileadd[block]);

		if (IsTileType(tile, MP_STREET)) {

			/* Don't allow building over roads of other cities */

				_grow_town_result = -1;

				/* If we are in the SE, and this road-piece has no town owner yet, it just found an

				*  owner :) (happy happy happy road now) */

				SetTileOwner(tile, OWNER_TOWN);

				SetTownIndex(tile, t->index);

			}

		}

		// Max number of times is checked.

	} while (--_grow_town_result >= 0);

	return (_grow_town_result == -2);

}