message: fix postgresql_coroutine metaData method
diff: @@ -436,10 +436,11 @@ static int meta_data_result_parse(PGObject *object) {
  }
  array_init(object->return_value);
  - array_init(&elem);
  +
  for (i = 0; i < num_rows; i++) {
  object->result = pg_result;
  char *name;
  + array_init(&elem);
  /* pg_attribute.attnum */
  add_assoc_long_ex(&elem, "num", sizeof("num") - 1, atoi(PQgetvalue(pg_result, i, 1)));
  /* pg_type.typname */
  