libavcodec/ffv1.c:266: error: Uninitialized Value
  The value read from l2tab[_] was never initialized.

libavcodec/ffv1.c:266:25: 
264.                 for (m = 0; m < 256; m++)
265.                     if (occ[m]) {
266.                         len -= occ[m] *     (p  * l2tab[m] +
                             ^
267.                                         (1 - p) * l2tab[256 - m]);
268.                     }
