libavformat/wav.c:183: error: Uninitialized Value
  The value read from data_size was never initialized.

libavformat/wav.c:183:5: 
181.                            AVFormatParameters *ap)
182. {
183.     int64_t size, av_uninit(data_size);
         ^
184.     int rf64;
185.     unsigned int tag;
