spree/spree_reviews — pull request #74 by urimikhli (2013-09-25 14:39:28+00:00)
Title: 1-3-stable: Null ratings in admin/reviews. 

Even though ratings shouldn't ever be null, it does happen.

The helper txt_stars() throws and exception on a null rating, which means that the user can no longer get to his admin/reviews page and manage his reviews.

Setting a default value for the rating gets around that problem.