message: Don't show unique file id warning if there is no file name
diff: @@ -84,6 +84,9 @@ std::vector<std::unique_ptr<IndexFile>> FileConsumer::TakeLocalState() {
  void FileConsumer::EmitError(CXFile file) const {
  std::string file_name = clang::ToString(clang_getFileName(file));
  + // TODO: Investigate this more, why can we get an empty file name?
  + if (!file_name.empty()) {
  std::string error_message = "Could not get unique file id for " + file_name + " when parsing " + parse_file_;
  std::cerr << error_message << std::endl;
  }
  +}
  \ No newline at end of file
  