Slide but fade on wrap around animation

[incredibleray]

I have an idea for a new animation for infinite mode. Using slide normally, but use fade when we need to wrap around in infinite mode. e.g. going from first slide to last, or last to first.

Reason is the short transition time set for regular slide animation will create glitches (for me it's white screen) when sliding through a large number of carousel pages. fade animation will do very well to switch from the last slide to first.

I created a change to implement it, but it do not work, can someone point out where I made mistake? Thanks! #754