madrobby/zepto — pull request #765 by woc2006 (2013-06-03 12:40:37+00:00)
Title: Ensure animate callback always triggered

Run this code on my Galaxy S3 (Android 4.1)
```javascript
scroller.animate({
translateX : '-500px'
}, 300, 'ease-out', function(){
alert('hello, callback here');
});
```
The callback never runs.
Tested on ios, and it works.