message: Allowing for zero and more than one Command Center in a savegame
diff: @@ -276,8 +276,9 @@ int MapViewState::refinedResourcesInStorage()
  void MapViewState::countPlayerResources()
  {
  - StructureList storage = NAS2D::Utility<StructureManager>::get().structureList(Structure::StructureClass::Storage);
  - storage.insert(storage.begin(), mTileMap->getTile(ccLocation(), 0).structure());
  + auto storage = NAS2D::Utility<StructureManager>::get().structureList(Structure::StructureClass::Storage);
  + auto& command = NAS2D::Utility<StructureManager>::get().structureList(Structure::StructureClass::Command);
  + storage.insert(storage.begin(), command.begin(), command.end());
  StorableResources resources;
  for (auto structure : storage)
  