Unbreak 'svn diff C:/' on Windows and/or 'svn diff /' on *nix.
Unbreak 'svn diff C:/' on Windows and/or 'svn diff /' on *nix.

* subversion/libsvn_wc/diff_local.c
  (ensure_state): Don't recurse endlessly when the anchor path is a root
    dirent.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1541635 13f79535-47bb-0310-9956-ffa450edef68

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