From f73901ca9adcab29d5e8d1d4c7dca36d16806b93 Mon Sep 17 00:00:00 2001
From: Strangerke
Date: Sat, 15 Mar 2014 10:21:40 +0100
Subject: VOYEUR: Add a check to avoid potential use of negative value as an
 array index

---
 engines/voyeur/files_threads.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'engines/voyeur/files_threads.cpp')

diff --git a/engines/voyeur/files_threads.cpp b/engines/voyeur/files_threads.cpp
index 98fe0d0bbf..700944f7ef 100644
--- a/engines/voyeur/files_threads.cpp
+++ b/engines/voyeur/files_threads.cpp
@@ -86,6 +86,9 @@ bool ThreadResource::loadAStack(int stackId) {
 }
 
 void ThreadResource::unloadAStack(int stackId) {
+	if (stackId < 0)
+		return;
+
 	if ((_vm->_stampFlags & 1) && _useCount[stackId]) {
 		if (--_useCount[stackId] == 0) {
 			_vm->_stampLibPtr->freeBoltMember(_vm->_controlPtr->_memberIds[stackId]);
-- 
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