Fix a typo in comment.
Fix a typo in comment.

* subversion/libsvn_client/update.c
  (svn_client__update_internal): s/boton/baton/


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@908368 13f79535-47bb-0310-9956-ffa450edef68

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