Remove a couple of redundant checks that we get in the DB for free.
Remove a couple of redundant checks that we get in the DB for free.

* subversion/libsvn_wc/adm_ops.c
  (svn_wc_set_changelist2): As above.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1091201 13f79535-47bb-0310-9956-ffa450edef68

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