handle mavlink packets

def mavlink_packet(self, m):
        '''handle mavlink packets'''
        if m.get_type() == 'GLOBAL_POSITION_INT':
            if self.settings.target_system == 0 or self.settings.target_system == m.get_srcSystem():
                self.packets_mytarget += 1
            else:
                self.packets_othertarget += 1