message: Use vectorized `TileMap::getTile`
diff: @@ -136,7 +136,7 @@ TileMap::~TileMap()
  void TileMap::removeMineLocation(const NAS2D::Point_2d& pt)
  {
  mMineLocations.erase(find(mMineLocations.begin(), mMineLocations.end(), pt));
  - getTile(pt.x(), pt.y(), 0)->pushMine(nullptr);
  + getTile(pt, 0)->pushMine(nullptr);
  }
  @@ -496,7 +496,7 @@ void TileMap::serialize(NAS2D::Xml::XmlElement* element)
  XmlElement *mine = new XmlElement("mine");
  mine->attribute("x", mMineLocations[i].x());
  mine->attribute("y", mMineLocations[i].y());
  - getTile(mMineLocations[i].x(), mMineLocations[i].y(), LEVEL_SURFACE)->mine()->serialize(mine);
  + getTile(mMineLocations[i], LEVEL_SURFACE)->mine()->serialize(mine);
  mines->linkEndChild(mine);
  }
  