Add a note to the working copy crop function about issue #4636.
Add a note to the working copy crop function about issue #4636.

* subversion/libsvn_wc/crop.c
  (crop_children): Add comment.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1764449 13f79535-47bb-0310-9956-ffa450edef68

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