libavcodec/alsdec.c:772: error: Uninitialized Value
  The value read from sx[_] was never initialized.

libavcodec/alsdec.c:772:67: 
770. 
771.                 if (res == cur_tail_code) {
772.                     unsigned int max_msb =   (2 + (sx[sb] > 2) + (sx[sb] > 10))
                                                                       ^
773.                                           << (5 - delta[sb]);
774. 
