Visible screen flicker when view controller is scaled

[hokster7]

Tested on the simulator.

[mixtly87]

I fixed it like this: in ADFlipTransition.m, line 335 where last completion block begins:

if (modal) {
    [srcViewController presentViewController:[self destinationViewController] animated:NO completion:^{
        [destView removeFromSuperview];
    }];
    [[self sourceView] setHidden:NO];
}
else
{
    [destView removeFromSuperview];
}

The key is to remove destView only after srcViewController has been presented.

[adamdebono]

Sorry but I'm too busy to maintain my OSS stuff these days. Feel free to make a pull request with the changes.