Remove another use of entries for checking if a node exists.
Remove another use of entries for checking if a node exists.

* subversion/libsvn_wc/adm_ops.c
  (svn_wc__do_update_cleanup): Read db data instead of entries and check the
     exclude hash before even looking at the database.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion