send all waypoints to vehicle

def send_all_waypoints(self):
        '''send all waypoints to vehicle'''
        self.master.waypoint_clear_all_send()
        if self.wploader.count() == 0:
            return
        self.loading_waypoints = True
        self.loading_waypoint_lasttime = time.time()
        self.master.waypoint_count_send(self.wploader.count())