Method have_new_realtime_refresh

DSView/pv/sigsession.cpp:2363–2372

    }

    bool SigSession::have_new_realtime_refresh(bool keep)
    {
        if (_rt_ck_refresh_time_id != _rt_refresh_time_id){
            if (!keep){
                _rt_ck_refresh_time_id = _rt_refresh_time_id;
            }
            return true;
        }
        return false;    
    }

    void SigSession::clear_decode_result()
    {