libavcodec/interplayvideo.c:522: error: Uninitialized Value
  The value read from P[_] was never initialized.

libavcodec/interplayvideo.c:522:17: 
520.         }
521. 
522.     } else if ((P[0] > P[1]) && (P[2] <= P[3])) {
                     ^
523. 
524.         /* 1 of 4 colors for each 2x1 block, need 8 more bytes */
