$NetBSD: patch-ab,v 1.2 2011/10/18 11:13:56 ryoon Exp $

--- ao.c.orig	2011-10-01 09:50:12.000000000 +0000
+++ ao.c
@@ -234,6 +234,7 @@ void open_ao_playdevice(struct mad_heade
            and restore it afterwards */
         signal(SIGINT, SIG_DFL);
         
+	memset(&format, 0, sizeof(format));
         format.bits = 16;
         format.rate = header->samplerate;
         format.channels = (options.opt & MPG321_FORCE_STEREO) ? 2 : MAD_NCHANNELS(header);