On the reuse-ra-session branch: Fix session closing.
On the reuse-ra-session branch: Fix session closing.

* subversion/libsvn_ra/ra_loader.c
  (svn_ra__close): Do indeed destroy the session pool.
   The assumption that it couldn't be safely destroyed was caused by
   a misunderstanding of the side effects of a different bug that
   is now fixed.


git-svn-id: e84a316744199a3455081dfc07023ba2eb93344a@1657111 13f79535-47bb-0310-9956-ffa450edef68

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