When you click back arrow and you have only 2 images, the animation goes forward, not backward

[asalha]

First thank you for your good work, I have been looking for so long for something basic and simple like looping in a carousel and I found yours.

The issue is simple to reproduce:

1. Put only 2 images in the carousel
2. Activate arrows (in my case bullets too)
3. If you click on right arrow, it works perfect, if you click on left arrow it goes forward (the correct image as there's only one) instead of backward.

Thanks