ng-class-odd/even don't always remove classes when new entry prepended

[Odi1]

The recent changes around ng-class-odd and ng-class-even seem to have introduced a bug. When adding an entry at the top of the underlying data array, the shifted entries get the new class added, but the old class is not removed.

Have a look at the example: http://jsfiddle.net/eXh7J/1/
When pressing the "prepend" button, the first few entries look fine, they have only one class. But from the 4th entry on, each entry has two classes. Both the odd and the even class.

This broke with v1.2.16. It was still working in v1.2.15.

[shahata]

I know why this happens. On it.