From a197d91df64cb625c6640fdd9fe0a5f74d61a208 Mon Sep 17 00:00:00 2001
From: Filippos Karapetis
Date: Fri, 16 May 2014 20:26:49 +0300
Subject: MADS: Add a sanity check in pollActiveChannel()

This avoids a crash when Rex is knocked unconscious in scene 318
---
 engines/mads/nebular/sound_nebular.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'engines/mads/nebular/sound_nebular.cpp')

diff --git a/engines/mads/nebular/sound_nebular.cpp b/engines/mads/nebular/sound_nebular.cpp
index 5ee34b416f..666b686267 100644
--- a/engines/mads/nebular/sound_nebular.cpp
+++ b/engines/mads/nebular/sound_nebular.cpp
@@ -413,6 +413,10 @@ void ASound::pollActiveChannel() {
 		if (--_activeChannelPtr->_activeCount <= 0) {
 			for (;;) {
 				byte *pSrc = chan->_pSrc;
+				if (!chan->_ptr1) {
+					warning("pollActiveChannel(): No data found for sound channel");
+					break;
+				}
 				if (!(*pSrc & 0x80) || (*pSrc <= 0xF0)) {
 					if (updateFlag)
 						updateActiveChannel();
-- 
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