QB_WANTW
backenab = qbp->qb_flag & QB_WANTW;
if (backenab & (QWANTW|QB_WANTW)) {
qbp->qb_flag &= ~QB_WANTW;
if (backenab & (QWANTW|QB_WANTW))
if ((qbp->qb_flag & QB_WANTW) &&
qbp->qb_flag &= ~QB_WANTW;
qbp->qb_flag |= QB_WANTW;
qbp->qb_flag |= QB_WANTW;
qbp->qb_flag |= QB_WANTW;
if ((qbp->qb_flag & QB_WANTW) && qbp->qb_first != NULL)