MAGIC
header.magic = swap(MAGIC);
header.magic = MAGIC;
if (header.magic != MAGIC) {
op->ov_magic = MAGIC;
if (op->ov_magic != MAGIC)
if (op->ov_magic == MAGIC) {
(pP1->iMagic!=MAGIC && swab32(pP1->iMagic)!=MAGIC) ){
pBt->needSwab = pP1->iMagic!=MAGIC;
pP1->iMagic = MAGIC;
pP1->iMagic = swab32(MAGIC);