Get rid of a couple of entry reads in favor of a node API.
Get rid of a couple of entry reads in favor of a node API.

* subversion/libsvn_client/merge.c
  (merge_file_changed, merge_file_added): Use svn_wc__node_get_kind() to
    determine if an node exists, rather than trying to read the entry.

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