libavcodec/dca.c:1516: error: Uninitialized Value
  The value read from extensions_mask was never initialized.

libavcodec/dca.c:1516:12: 
1514.     if (!!(extensions_mask & DCA_EXT_XXCH) != s->xxch_present)
1515.         av_log(s->avctx, AV_LOG_WARNING, "DTS XXCh detection mismatch.\n");
1516.     if (!!(extensions_mask & DCA_EXT_X96) != s->x96_present)
                 ^
1517.         av_log(s->avctx, AV_LOG_WARNING, "DTS X96 detection mismatch.\n");
1518. 
