FLG_SY_VISIBLE
if (sdp->sd_aux && ((sdp->sd_flags & FLG_SY_VISIBLE) == 0))
((sdp->sd_flags & FLG_SY_VISIBLE) == 0))
sdp->sd_flags |= FLG_SY_VISIBLE;
if ((sdp->sd_flags & FLG_SY_VISIBLE) == 0)