message: Reset structure tracker on game load
diff: @@ -265,6 +265,8 @@ void MapViewState::load(const std::string& filePath)
  NAS2D::Utility<StructureManager>::get().dropAllStructures();
  ccLocation() = CcNotPlaced;
  + mStructureTracker.reset();
  +
  delete mTileMap;
  mTileMap = nullptr;
  