Function bitread_init

Source/Amiga/dernc.cpp:250–253

* Initialises a bit stream with the first two bytes of the packed * data. */

 * data.
 */
static void bitread_init (bit_stream *bs, unsigned char **p) {
    bs->bitbuf = lword (*p);
    bs->bitcount = 16;
}

/*
 * Fixes up a bit stream after literals have been read out of the