message: camera: minor fix
diff: @@ -482,6 +482,7 @@ void CameraImpl::get_mode_async(Camera::mode_callback_t callback)
  if (_get_mode.callback != nullptr) {
  if (callback) {
  callback(Camera::Result::BUSY, Camera::Mode::UNKNOWN);
  + return;
  }
  }
  _get_mode.callback = callback;
  