Minor optimization in the changelist setting code: don't bother to vacuum the actual nodes table if we aren't deleting changelists.
Minor optimization in the changelist setting code: don't bother to vacuum the
actual nodes table if we aren't deleting changelists.

* subversion/libsvn_wc/wc_db.c
  (set_changelist_txn): Only run the delete on the ACTUAL table if removing
    changelists.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1103583 13f79535-47bb-0310-9956-ffa450edef68

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