libavformat/wav.c:384: error: Uninitialized Value
  The value read from data_size was never initialized.

libavformat/wav.c:384:5: 
382. static int wav_read_header(AVFormatContext *s)
383. {
384.     int64_t size, av_uninit(data_size);
         ^
385.     int64_t sample_count=0;
386.     int rf64;
