message: fix(Parser): fix bug of ASK
diff: @@ -1316,7 +1316,7 @@ void GeneralEvaluation::getFinalResult(ResultSet &ret_result)
  else if (this->query_tree.getQueryForm() == QueryTree::Ask_Query)
  {
  - ret_result.select_var_num = 1;
  + ret_result.true_select_var_num = ret_result.select_var_num = 1;
  ret_result.setVar(vector<string>(1, "?_askResult"));
  ret_result.ansNum = 1;
  