Add cleanup in case of error.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@3967 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/MacOSX/CIrrDeviceMacOSX.mm

@@ -768,7 +768,7 @@ bool CIrrDeviceMacOSX::createWindow()
 	}
 	@catch (NSException *exception)
 	{
-		// FIXME: cleanup may be needed here
+		closeDevice();
 		result = false;
 	}