libavcodec/mss4.c:434: error: Uninitialized Value
  The value read from vec_len[_] was never initialized.

libavcodec/mss4.c:434:33: 
432.                 }
433.                 for (k = 0; k < 3; k++)
434.                     *dst[k]++ = get_value_cached(gb, vals[k], vec[k],
                                     ^
435.                                                  vec_len[k], k,
436.                                                  val_shift, prev_pix);
