Function is_smooth_wall

plugins/dig.cpp:256–260

}

static bool is_smooth_wall(const df::coord &pos) {
    df::tiletype *tt = Maps::getTileType(pos);
    return tt && tileSpecial(*tt) == df::tiletype_special::SMOOTH
                && tileShape(*tt) == df::tiletype_shape::WALL;
}

static bool is_aquifer(int16_t x, int16_t y, int16_t z, df::tile_designation *des = NULL) {
    if (!des)