dojo/dijit — pull request #13 by ramunasd (2013-11-07 11:12:42+00:00)
Title: prevent from querying for empty string when FilteringSelect value is set to null

This makes difference between empty string and null as value. Before this fix FilteringSelect performs queries to backend store with empty string. This is not case when value is empty string. In that case, as and before, FilteringSelect performs query with wildcard.