[1.2.X] Fixed #13081 - Admin actions lose get-parameters in changelist view

  
Thanks to joh for report and to SmileyChris for patch.

Backport of [13696] from trunk


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@13697 bcc190cf-cafb-0310-a4f2-bffc1f526a37