message: Fix aio read memory leak.
diff: @@ -507,6 +507,7 @@ static void aio_onReadCompleted(swAio_event *event)
  if (event->error == 0)
  {
  + // TODO: Optimization: reduce memory copy
  ZVAL_STRINGL(&result, (char* )event->buf, event->ret);
  }
  else
  @@ -521,6 +522,7 @@ static void aio_onReadCompleted(swAio_event *event)
  {
  zval_ptr_dtor(retval);
  }
  + zval_ptr_dtor(&result);
  efree(event->buf);
  efree(context);
  }
  