see if cmd is a MAV_CMD with a latitide/longitude.
        We check if it has Latitude and Longitude params in the right indexes

def is_location_command(self, cmd):
        '''see if cmd is a MAV_CMD with a latitide/longitude.
        We check if it has Latitude and Longitude params in the right indexes'''
        mav_cmd = mavutil.mavlink.enums['MAV_CMD']
        if not cmd in mav_cmd:
            return False
        if not mav_cmd[cmd].param.get(5,'').startswith('Latitude'):
            return False
        if not mav_cmd[cmd].param.get(6,'').startswith('Longitude'):
            return False
        return True