Implement a TODO.
Implement a TODO.

* subversion/libsvn_fs_fs/cached_data.c
  (get_root_changes_offset): Instead of a plain APR file, take a proper
                             revision file struct as parameter.  That
                             carries information about the pack state.
  (svn_fs_fs__rev_get_root,
   svn_fs_fs__get_changes): Update callers.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1615352 13f79535-47bb-0310-9956-ffa450edef68

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