Issue with disabled state on prev/next buttons when using a carrousel pager with a slideshow

Hello there,

When using a carousel pager there is a bug with prev/next button losing their disabled state if the current slide slide is beyond the boundary slide.

It can be seen on the demo page:
http://jquery.malsup.com/cycle2/demo/caro-pager.php

The next button become disabled when the slide 4 is reached. But clicking on any pager slide beyond the fourth will remove the disabled state.

Here is the code adding/removing the disabled state/class to the buttons.

I have modified it by replacing "==" tests with ">=" and "<=" respectively.
Notice: the bug has been verified with the next button, I am not sure there is a bug with the prev button as my prev boundary is the first slide (index 0), there is nothing beyond this one.

This fix works for me but I am not sure if this is the correct way to fix it.