libavcodec/wmaprodec.c:555: error: Uninitialized Value
  The value read from contains_subframe[_] was never initialized.

libavcodec/wmaprodec.c:555:17: 
553.             WMAProChannelCtx* chan = &s->channel[c];
554. 
555.             if (contains_subframe[c]) {
                     ^
556.                 if (chan->num_subframes >= MAX_SUBFRAMES) {
557.                     av_log(s->avctx, AV_LOG_ERROR,
