Initialize ContextManager pointer and release it's memory at the end.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@5208 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/CIrrDeviceStub.cpp

@@ -21,7 +21,7 @@ CIrrDeviceStub::CIrrDeviceStub(const SIrrlichtCreationParameters& params)
 : IrrlichtDevice(), VideoDriver(0), GUIEnvironment(0), SceneManager(0),
 	Timer(0), CursorControl(0), UserReceiver(params.EventReceiver),
 	Logger(0), Operator(0), Randomizer(0), FileSystem(0),
-	InputReceivingSceneManager(0), VideoModeList(0),
+	InputReceivingSceneManager(0), VideoModeList(0), ContextManager(0),
 	CreationParams(params), Close(false)
 {
 	Timer = new CTimer(params.UsePerformanceTimer);
@@ -65,6 +65,9 @@ CIrrDeviceStub::~CIrrDeviceStub()
 	if (VideoDriver)
 		VideoDriver->drop();
 
+	if (ContextManager)
+		ContextManager->drop();
+
 	if ( FileSystem )
 		FileSystem->drop();