Factor out repeated code from find_unmerged_mergeinfo().
Factor out repeated code from find_unmerged_mergeinfo().

* subversion/libsvn_client/merge.c
  (find_youngest_merged_rev, find_unmerged_mergeinfo_subroutine): New
    functions, factored out ...
  (find_unmerged_mergeinfo): ... from here.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1234053 13f79535-47bb-0310-9956-ffa450edef68

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