DUPB_NOLOAN
((nbp = head = DUPB_NOLOAN(bp)) == NULL))
if ((nbp->b_cont = DUPB_NOLOAN(bp->b_cont)) == NULL) {
((nbp = head = DUPB_NOLOAN(bp)) == NULL))
if ((nbp->b_cont = DUPB_NOLOAN(bp->b_cont)) == NULL) {