DV_DSIZE
fPad = malloc(DV_DSIZE*DV_MAXBLOCKS);
memset(fPad, 0xff, DV_DSIZE*DV_MAXBLOCKS);
npad *= DV_DSIZE;
memcpy(dest, dv, DV_DSIZE);
dest = (char*)dest + DV_DSIZE;
