Follow-up to r1333936, (hopefully) fixing the "commit disjoint working copies" case that some of the buildbots are puking on right now.
Follow-up to r1333936, (hopefully) fixing the "commit disjoint working
copies" case that some of the buildbots are puking on right now.

* subversion/libsvn_client/ra.c
  (svn_client__open_ra_session_internal): base_dir_abspath might not
    point to a working copy directory.  If that's the case, don't try
    to calculate a working copy root path.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1334029 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion