pull up r19852 from trunk

pull up r19852 from trunk

 r19852@cathode-dark-space:  jaltman | 2007-08-24 10:20:31 -0400
 ticket: new
 subject: NIM: resource leak in khui_action_trigger()
 component: windows

 The khui_action_trigger() function in the Network Identity Manager API
 creates a copy of the current user interface context (which contains
 information about the credentials and identities that are currently
 selected) before triggering the requested action.  Then it will use
 the copy to restore the user interface context to its previous state.
 A coding error results in the copy of the context to never be
 released.  As a result there is a resource leak.

 The attached patch fixes the leak by releasing the context once it
 is no longer needed.

ticket: 5673
version_fixed: 1.6.3

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-6@19987 dc483132-0cff-0310-8789-dd5450dbe970