libavcodec/dca.c:1514: error: Uninitialized Value
  The value read from extensions_mask was never initialized.

libavcodec/dca.c:1514:12: 
1512.     if (!!(extensions_mask & DCA_EXT_XCH) != s->xch_present)
1513.         av_log(s->avctx, AV_LOG_WARNING, "DTS XCh detection mismatch.\n");
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)
