From 75fd690c20c8b33a02584e32b0727145cad6e1db Mon Sep 17 00:00:00 2001
From: Travis Howell <kirben@scummvm.org>
Date: Sat, 28 Aug 2004 04:34:34 +0000
Subject: [PATCH] Safety check

svn-id: r14804
---
 scumm/sound.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/scumm/sound.cpp b/scumm/sound.cpp
index a336d1ccd9b..fa273ed834f 100644
--- a/scumm/sound.cpp
+++ b/scumm/sound.cpp
@@ -210,7 +210,7 @@ void Sound::playSound(int soundID, int offset) {
 		size = musicFile.readUint32LE();
 
 		if (music_offs > total_size || (size + music_offs) > total_size) {
-			warning("Bad music offsets");
+			warning("playSound: Bad music offsets");
 			musicFile.close();
 			return;
 		}
@@ -269,7 +269,13 @@ void Sound::playSound(int soundID, int offset) {
 		if (READ_UINT32(ptr) != MKID('SDAT'))
 			return;	// abort
 
-		size = READ_BE_UINT32(ptr+4) - offset - 8;
+		size = READ_BE_UINT32(ptr+4) - 8;
+		if (offset > size) {
+			warning("playSound: Bad sound offset");
+			offset = 0;
+		} 
+		size -= offset;
+
 		if (_overrideFreq) {
 			// Used by the piano in Fatty Bear's Birthday Surprise
 			rate = _overrideFreq;