update_editor.c:close_edit setting "un-incomplete"

Looking a issue 3993, a serf/googlecode oddity
http://subversion.tigris.org/issues/show_bug.cgi?id=3993
leads me to this code in libsvn_wc/update_editor.c:close_edit

  /* The editor didn't even open the root; we have to take care of
     some cleanup stuffs. */
  if (! eb->root_opened
      && *eb->target_basename == '\0')
    {
      /* We need to "un-incomplete" the root directory. */
      SVN_ERR(svn_wc__db_temp_op_end_directory_update(eb->db,
                                                      eb->anchor_abspath,
                                                      scratch_pool));
    }

That's WCNG code, but the concept has been present since 1.0. The
"un-incomplete" state is presence=normal in WCNG terms.

Why do we do that? If we don't call open_root and the directory is
incomplete then it must have been incomplete before the update started.
Is it correct for a drive that doesn't call open_root to change such a
directory to normal? I think leaving the directory incomplete is the
correct action.

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