libavcodec/dca.c:1512: error: Uninitialized Value
  The value read from extensions_mask was never initialized.

libavcodec/dca.c:1512:12: 
1510.     if (!(extensions_mask & DCA_EXT_CORE))
1511.         av_log(s->avctx, AV_LOG_WARNING, "DTS core detection mismatch.\n");
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)
