Fix a bug in subtree merging.
Fix a bug in subtree merging.

Found by: Barry Scott <barry{_AT_}barrys-emacs.org>

* subversion/libsvn_client/merge.c
  (adjust_deleted_subtree_ranges): Don't pass an empty rangelist to
    svn_rangelist_intersect(), because that's invalid and throws an
    assertion failure; instead, construct the result manually.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1146781 13f79535-47bb-0310-9956-ffa450edef68

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