libavcodec/alac.c:374: error: Uninitialized Value
  The value read from prediction_type[_] was never initialized.

libavcodec/alac.c:374:24: 
372.                                                alac->nb_samples, readsamplesize,
373.                                                NULL, 31, 0);
374.             } else if (prediction_type[ch] > 0) {
                            ^
375.                 av_log(avctx, AV_LOG_WARNING, "unknown prediction type: %i\n",
376.                        prediction_type[ch]);
