SDSegmentedControl Control not displayed properly after rotating in another view controller

I'm not sure if it is linked to issue #44, but I have found another bug: when rotating the device when the segmented control is not visible (i.e. in another view controller) and then returning to the view controller again, the paths aren't drawn correctly.

To reproduce:

Create an empty iOS application, add SDSegmentedControl and use this as the application: didFinishLaunchingWithOptions:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    UIViewController *firstVC = [[UIViewController alloc] init];
    firstVC.title = @"Segment";
    UIViewController *secondVC = [[UIViewController alloc] init];
    secondVC.title = @"Dummy";

    SDSegmentedControl *segmentController = [[SDSegmentedControl alloc] initWithItems:@[@"1", @"2"]];
    segmentController.frame = CGRectMake(0, 0, self.window.frame.size.width, segmentController.frame.size.height);

    [firstVC.view addSubview:segmentController];

    UITabBarController *rootController = [[UITabBarController alloc] init];
    [rootController addChildViewController:firstVC];
    [rootController addChildViewController:secondVC];
    self.window.rootViewController = rootController;
    [self.window makeKeyAndVisible];
    return YES;
}

Now start the application. The following scenario works as expected: