message: Remove r-value ref
diff: @@ -193,7 +193,7 @@ CallParams read<CallParams>(const cv::FileNode& fn) {
  template <typename V>
  std::map<std::string, V> readMap(const cv::FileNode& fn) {
  std::map<std::string, V> map;
  - for (auto&& item : fn) {
  + for (auto item : fn) {
  map.emplace(item.name(), read<V>(item));
  }
  return map;
  