sproutcore/sproutcore — pull request #904 by fairbanksg (2013-01-14 16:04:10+00:00)
Title: Fix indexing problem in SC.CollectionView.

The index check here was comparing idx, an index into itemViews, to len,
the length of viewsToRedraw.

I removed the index check since if the index is out of bounds, the result
will be undefined, which insertBefore treats the same as null.