message: fix callback style
diff: @@ -30,7 +30,9 @@ void ManualControlImpl::start_position_control_async(const ManualControl::Result
  {
  if (_input == Input::NotSet) {
  if (callback) {
  - callback(ManualControl::Result::Unknown);
  + auto temp_callback = callback;
  + _parent->call_user_callback(
  + [temp_callback]() { temp_callback(ManualControl::Result::Unknown); });
  }
  return;
  }
  @@ -60,7 +62,9 @@ void ManualControlImpl::start_altitude_control_async(const ManualControl::Result
  {
  if (_input == Input::NotSet) {
  if (callback) {
  - callback(ManualControl::Result::Unknown);
  + auto temp_callback = callback;
  + _parent->call_user_callback(
  + [temp_callback]() { temp_callback(ManualControl::Result::Unknown); });
  }
  return;
  }
  