message: Update landingSiteSuitable to use range for with DirectionScan3x3
diff: @@ -216,11 +216,9 @@ int totalStorage(StructureList& structures)
  */
  bool landingSiteSuitable(TileMap* tilemap, int x, int y)
  {
  - for (int offY = y - 1; offY <= y + 1; ++offY)
  + for (const auto offset : DirectionScan3x3)
  {
  - for (int offX = x - 1; offX <= x + 1; ++offX)
  - {
  - Tile* tile = tilemap->getTile({offX, offY});
  + Tile* tile = tilemap->getTile(NAS2D::Point{x, y} + offset);
  if (tile->index() == TerrainType::TERRAIN_IMPASSABLE)
  {
  @@ -238,7 +236,6 @@ bool landingSiteSuitable(TileMap* tilemap, int x, int y)
  throw std::runtime_error("Tile obstructed by a Thing other than a Mine.");
  }
  }
  - }
  return true;
  }
  