Add a prop fetching function for the Ev2 shims in the repos commit editor.
Add a prop fetching function for the Ev2 shims in the repos commit editor.

* subversion/libsvn_repos/commit.c
  (prop_fetch_func): New.
  (svn_repos_get_commit_editor5): Provide the props fetch func to the shim.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1190115 13f79535-47bb-0310-9956-ffa450edef68

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