libavcodec/interplayvideo.c:725: error: Uninitialized Value
  The value read from P[_] was never initialized.

libavcodec/interplayvideo.c:725:13: 
723.             if (x == 4)
724.                 index++;
725.             *s->pixel_ptr++ = P[index];
                 ^
726.         }
727.         s->pixel_ptr += s->line_inc;
