From 72fd923cf5b714f5905b9f01547dc421ce7a1eb4 Mon Sep 17 00:00:00 2001
From: Kari Salminen
Date: Sun, 19 Aug 2007 23:28:38 +0000
Subject: Fixes previously crashing sound. Crash happened because of PCjr
 4-channel mixing code trying to use uninitialized values (phase, ins etc)
 when mixSound was called before anything was playing.

svn-id: r28672
---
 engines/agi/sound.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'engines/agi/sound.cpp')

diff --git a/engines/agi/sound.cpp b/engines/agi/sound.cpp
index 5c19a3b55a..c06921c4ae 100644
--- a/engines/agi/sound.cpp
+++ b/engines/agi/sound.cpp
@@ -663,6 +663,9 @@ uint32 SoundMgr::mixSound(void) {
 
 	memset(_sndBuffer, 0, BUFFER_SIZE << 1);
 
+	if (!_playing || _playingSound == -1)
+		return BUFFER_SIZE;
+
 	// Handle Apple IIGS sound mixing here
 	if (_vm->_soundemu == SOUND_EMU_APPLE2GS && _playing && _playingSound != -1) {
 		//IIgsWaveInfo &waveInfo = _IIgsChannel.ins.oscList(0).waves[0];
-- 
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