libavcodec/wavpack.c:220: error: Uninitialized Value
  The value read from br[_] was never initialized.

libavcodec/wavpack.c:220:13: 
218.             br[1] = 0;
219.         }else{
220.             br[1] = br[0] + balance;
                 ^
221.             br[0] = br[0] - balance;
222.         }
