Ev2 shims: Make sure our root baton is open before trying to close it.
Ev2 shims: Make sure our root baton is open before trying to close it.

Current number of Ev2 test failures: 662

* subversion/libsvn_delta/compat.c
  (complete_cb): On the off chance that no subsequent changes were made to our
    tree, ensure the root baton is opened.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1209735 13f79535-47bb-0310-9956-ffa450edef68

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