libavformat/apetag.c:50: error: Uninitialized Value
  The value read from c was never initialized.

libavformat/apetag.c:50:9: 
48.     }
49.     key[i] = 0;
50.     if (c != 0) {
            ^
51.         av_log(s, AV_LOG_WARNING, "Invalid APE tag key '%s'.\n", key);
52.         return -1;
