dirty fix to fly without joystick. Because autopilot_on_rc_frame is now only called once, please make sure you first have GPS fix because you launch the autopilot software, or RELAUNCH it after you have acquired GPS FIX, so that you will get in NAV mode. When you lose GPS FIX you will switch back to SAFE, where you will be stuck again. I know this is dirty, pprz rotorcraft logic has to be rewritten carefully for it to work nicely without RC.