message: core: add error printf for param_ext
diff: @@ -357,6 +357,8 @@ void MavlinkParameters::process_param_ext_ack(const mavlink_message_t &message)
  } else {
  + LogErr() << "Somehow we did not get an ack, we got: " << int(param_ext_ack.param_result);
  +
  // We are done but unsuccessful
  // TODO: we need better error feedback
  if (work.callback) {
  