civicrm/civicrm-core — pull request #2782 by jaapjansma (2014-03-31 14:45:57+00:00)
Title: fixed issue CRM-14409 added hooks on case merge and on case reassign

See issue CRM-14409 https://issues.civicrm.org/jira/browse/CRM-14409
And the forum post http://forum.civicrm.org/index.php/topic,32211.0.html