OUIScalingView layoutSubViews doesn't call super

[memmons]

I've had an error similar to the following pop up a few times because OUIScalingViewController layoutSubViews doesn't call super:

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Auto Layout still required after executing -layoutSubviews needs to call super.'

This is an issue when using an OUIScalingView subclass in a xib or storyboard that has autolayout turned on.

- (void)layoutSubviews;
{
    if (self.wantsShadowEdges) {
        [self updateShadowEdgeViews];
    }
}