libavformat/wav.c:185: error: Uninitialized Value
  The value read from data_size was never initialized.

libavformat/wav.c:185:5: 
183.                            AVFormatParameters *ap)
184. {
185.     int64_t size, av_uninit(data_size);
         ^
186.     int64_t sample_count=0;
187.     int rf64;
