CRCVAL_INITIAL
G.crc32val = CRCVAL_INITIAL;
crc32(CRCVAL_INITIAL, ef+(EB_HEADSIZE+4),
register ulg crcval = crc32(CRCVAL_INITIAL, tgt, (extent)G.outcnt);
crc32(CRCVAL_INITIAL, eb_data, (extent)eb_datlen))