message: fix(Query): clearer ERROR msg for kleeneClosure
diff: @@ -3923,7 +3923,7 @@ void GeneralEvaluation::kleeneClosure(TempResultSet *temp, TempResult *tr, \
  if (!tr || tr->result.size() == 0)
  {
  - cout << "[ERROR] Cannot process ?s <p>* ?o as the only graph pattern in WHERE clause." << endl;
  + cout << "[ERROR] Cannot process ?s <p>* ?o as the only graph pattern in WHERE clause. (1)" << endl;
  return;
  }
  @@ -3980,7 +3980,7 @@ void GeneralEvaluation::kleeneClosure(TempResultSet *temp, TempResult *tr, \
  objectIdx++;
  if (subjectIdx == tr->id_varset.vars.size() && objectIdx == tr->id_varset.vars.size())
  {
  - cout << "[ERROR] Cannot process ?s <p>* ?o as the only graph pattern in WHERE clause." << endl;
  + cout << "[ERROR] Cannot process ?s <p>* ?o as the only graph pattern in WHERE clause. (2)" << endl;
  return;
  }
  // prepPathQuery();
  @@ -4033,7 +4033,7 @@ void GeneralEvaluation::kleeneClosure(TempResultSet *temp, TempResult *tr, \
  // }
  }
  else
  - cout << "[ERROR] Cannot process ?s <p>* ?o as the only graph pattern in WHERE clause." << endl;
  + cout << "[ERROR] Cannot process ?s <p>* ?o as the only graph pattern in WHERE clause. (3)" << endl;
  }
  }
  