VINUM_NOMAGIC
|| (vflag && (hdr->magic == VINUM_NOMAGIC))) {
if (hdr->magic == VINUM_NOMAGIC)
vhdr->magic = VINUM_NOMAGIC; /* obliterate the magic, but leave the rest */
} else if (vhdr->magic == VINUM_NOMAGIC) /* was ours, but we gave it away */