message: fix CID#1430107
diff: @@ -131,7 +131,8 @@ void swoole_mysql_coro_init(int module_number TSRMLS_DC)
  }
  int mysql_query(zval *zobject, mysql_client *client, swString *sql, zval *callback TSRMLS_DC);
  -static zend_bool swoole_mysql_coro_close(zval *this)
  +
  +static int swoole_mysql_coro_close(zval *this)
  {
  SWOOLE_GET_TSRMLS;
  mysql_client *client = swoole_get_object(this);
  