ZVISION: Check if a key exists before returning _globalState value.

operator[] creates a key value pair if it doesn't exist. So blindly returning a value without checking if the
key exists could result in undefined behavior, depening on what the value is initialized to in its constructor

1 files changed, 4 insertions, 1 deletions

diff --git a/engines/zvision/script_manager.cpp b/engines/zvision/script_manager.cpp
index 2e57c18a3e..7fcade22c1 100644
--- a/engines/zvision/script_manager.cpp
+++ b/engines/zvision/script_manager.cpp
@@ -118,7 +118,10 @@ void ScriptManager::checkPuzzleCriteria() {
 }
 
 uint ScriptManager::getStateValue(uint32 key) {
-	return _globalState[key];
+	if (_globalState.contains(key))
+		return _globalState[key];
+	else
+		return 0;
 }
 
 void ScriptManager::setStateValue(uint32 key, uint value) {