libavformat/wavdec.c:152: error: Uninitialized Value
  The value read from umid_parts[_] was never initialized.

libavformat/wavdec.c:152:17: 
150.             /* the string formatting below is per SMPTE 330M-2004 Annex C */
151.             if (umid_parts[4] == 0 && umid_parts[5] == 0 &&
152.                 umid_parts[6] == 0 && umid_parts[7] == 0) {
                     ^
153.                 /* basic UMID */
154.                 snprintf(temp, sizeof(temp),
