libavcodec/bfi.c:97: error: Uninitialized Value
  The value read from offset was never initialized.

libavcodec/bfi.c:97:9: 
95.     while (dst != frame_end) {
96.         static const uint8_t lentab[4]={0,2,0,1};
97.         unsigned int byte = *buf++, av_uninit(offset);
            ^
98.         unsigned int code = byte >> 6;
99.         unsigned int length = byte & ~0xC0;
