[ backport from HEAD (rev 1.43) ]

When unlocking, the auto-checkin code does not need to refer to the
parent resource. We want to (possibly) check in only the resource
identified by the params.

Bug found by David Waite <mass@akuma.org>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@98188 13f79535-47bb-0310-9956-ffa450edef68