message: action_impl: make sure we receive the system state
diff: @@ -22,9 +22,13 @@ void ActionImpl::init()
  {
  using namespace std::placeholders; // for `_1`
  + // We need the system state.
  _parent->register_mavlink_message_handler(
  MAVLINK_MSG_ID_EXTENDED_SYS_STATE,
  std::bind(&ActionImpl::process_extended_sys_state, this, _1), (void *)this);
  +
  + // And we neet to make sure the system state is actually sent.
  + _parent->set_msg_rate(MAVLINK_MSG_ID_EXTENDED_SYS_STATE, 1.0);
  }
  void ActionImpl::deinit()
  