libavcodec/alac.c:468: error: Uninitialized Value
  The value read from prediction_type[_] was never initialized.

libavcodec/alac.c:468:24: 
466.                                                outputsamples, readsamplesize,
467.                                                NULL, 31, 0);
468.             } else if (prediction_type[ch] > 0) {
                            ^
469.                 av_log(avctx, AV_LOG_WARNING, "unknown prediction type: %i\n",
470.                        prediction_type[ch]);
