Render Callback Is Not Executed When Using A Custom Render Function

[rvtraveller]

When you are using a custom render function, you have the option of returning false to prevent the default IAS render function from also executing. However, the callback to generate the nextUrl (and presumably any other callback) is only executed if the default render function is used. If a custom render function is used, the callback is not called.

Repro for this would look something like the following:

1. Create an IAS instance and bind your own function to the on('render') event. This function should return false at the end.
2. Navigate to the page with your custom IAS instance and render event handler.
3. Observe jQuery.ias().nextUrl does not change.

Pull request coming soon.