message: mavlink_passthrough: reset intercepting messages
  When being destructed we should stop to intercept all the messages.
diff: @@ -17,7 +17,11 @@ MavlinkPassthroughImpl::~MavlinkPassthroughImpl()
  void MavlinkPassthroughImpl::init() {}
  -void MavlinkPassthroughImpl::deinit() {}
  +void MavlinkPassthroughImpl::deinit()
  +{
  + _parent->intercept_incoming_messages(nullptr);
  + _parent->intercept_outgoing_messages(nullptr);
  +}
  void MavlinkPassthroughImpl::enable() {}
  