Fix issue 2974 - 'merge notifications show childs as merge targets at times.'
Fix issue 2974 - 'merge notifications show childs as merge targets at times.'

* subversion/libsvn_client/merge.c
  (find_nearest_ancestor): Always start the search for nearest ancestor 
   from 0.
  (notification_receiver): Only for operative notification path print merge
   begin notification line.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@867357 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion