libavcodec/wmaenc.c:57: error: Uninitialized Value
  The value read from extradata was never initialized.

libavcodec/wmaenc.c:57:5: 
55.     }else
56.         assert(0);
57.     avctx->extradata= extradata;
        ^
58.     s->use_exp_vlc = flags2 & 0x0001;
59.     s->use_bit_reservoir = flags2 & 0x0002;
