libavcodec/flacdec.c:307: error: Uninitialized Value
  The value read from b was never initialized.

libavcodec/flacdec.c:307:5: 
305.     const int blocksize = s->blocksize;
306.     int32_t *decoded = s->decoded[channel];
307.     int av_uninit(a), av_uninit(b), av_uninit(c), av_uninit(d), i;
         ^
308. 
309.     /* warm up samples */
