libavcodec/dca.c:1510: error: Uninitialized Value
  The value read from extensions_mask was never initialized.

libavcodec/dca.c:1510:11: 
1508.         s->profile = FFMAX(s->profile, FF_PROFILE_DTS_ES);
1509. 
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)
