civicrm/civicrm-core — pull request #2439 by deepak-srivastava (2014-01-31 07:38:48+00:00)
Title: CRM-14128 - Participant Count Report offers 'is not role' criteria - but...

... treats it the same as 'is role'

http://issues.civicrm.org/jira/browse/CRM-14128