FrozenNode/Laravel-Administrator — pull request #541 by maksymcierzniak (2014-03-19 10:59:17+00:00)
Title: Fixed relationship options_filter error

--fixed a bug with "Function name must be a string" in line 150 of Relationships/Relationship.php due to the assignment in line 75 which was going to set 'options_filter' as closure, but I believe it set it as function result instead, which is null in that case