cappuccino/cappuccino — pull request #1842 by stewa (2013-03-10 16:43:55+00:00)
Title: Fixed: Using keyboard navigation in empty CPCollectionView threw exception

Test case:

* Tests/Manual/CPCollectionViewNibTest
* Click a collection view to focus
* Press any cursor key (or shift + cursor key)
* Throws CPInvalidArgumentException: Range {-1, 1} is out of bounds.