Add some error tracing and fix a return value.
Add some error tracing and fix a return value.

* subversion/libsvn_wc/lock.c:
  (pool_cleanup): return APR_SUCCESS rather than SVN_NO_ERROR
  (open_all, svn_wc_adm_open3, open_anchor): use svn_error_return()


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@880342 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion