message: fix(Query): fix bug of shortestPath, shortestPathLen where src=dst
diff: @@ -1539,6 +1539,7 @@ void GeneralEvaluation::getFinalResult(ResultSet &ret_result)
  notFirstOutput = 1;
  vector<int> path; // Empty path
  pathVec2JSON(uid, vid, path, ss);
  + continue;
  }
  vector<int> path = pqHandler->shortestPath(uid, vid, proj[0].path_args.directed, pred_id_set);
  if (path.size() != 0)
  @@ -1561,6 +1562,7 @@ void GeneralEvaluation::getFinalResult(ResultSet &ret_result)
  ss << "{\"src\":\"" << kvstore->getStringByID(uid) \
  << "\",\"dst\":\"" << kvstore->getStringByID(vid) \
  << "\",\"length\":0}";
  + continue;
  }
  vector<int> path = pqHandler->shortestPath(uid, vid, proj[0].path_args.directed, pred_id_set);
  if (path.size() != 0)
  