$OpenBSD: patch-libmpcodecs_ad_pcm_c,v 1.3 2006/07/19 21:40:47 robert Exp $
--- libmpcodecs/ad_pcm.c.orig	Sun Jun 11 20:35:41 2006
+++ libmpcodecs/ad_pcm.c	Thu Jul  6 00:08:11 2006
@@ -20,6 +20,8 @@ LIBAD_EXTERN(pcm)
 static int init(sh_audio_t *sh_audio)
 {
   WAVEFORMATEX *h=sh_audio->wf;
+  if (!h)
+    return 0;
   sh_audio->i_bps=h->nAvgBytesPerSec;
   sh_audio->channels=h->nChannels;
   sh_audio->samplerate=h->nSamplesPerSec;