civicrm/civicrm-core — pull request #1985 by kirkatcaat (2013-11-14 16:26:20+00:00)
Title: Enable participant roles to be changed from counted to not counted (CRM-13761)

This patch fixes a bug on the Participant Role Options page (Administer -> CiviEvent -> Participant Roles) which prevents you from changing a participant role from being counted to not being counted.