[PATCH] Replace svn_path_join() in libsvn_client/repos_diff.c

[[[
Replace svn_path_join() since there is conflicting definitions on what a
path really is.

* subversion/libsvn_client/repos_diff.c
  (make_dir_baton,
   make_file_baton,
   delete_entry): Replace svn_path_join() with svn_dirent_join(). An
    eb->target is base in each call. It is a wc dir.

Patch by: Daniel Näslund <daniel_at_longitudo.com>
]]]
   
The diff editor in repos_diff.c is used for comparing two repository
versions but all paths for this patch is wc paths.

/Daniel