Extra update hook to fix hosting_site_alias table content

Follow-up for: #1681904: Ability to configure a url to redirect to in site configuration.

The redirection field has changed from an int to a varchar.
Sites that have not been edited recently can still have a '1' value, letting the site redirect to http://1/.

I think this update hook will fix the issue, but I'll try t verify in the coming week.

/**
 * Fixup redirection data after table change in hosting_alias_update_6203()
 */
function hosting_alias_update_6204() {
  $ret = array();
  $result = db_query("SELECT `nid` FROM {hosting_site_alias} WHERE `redirection`=1");
  while ($obj = db_fetch_object($result)) {
    $node = node_load($obj->nid);
    if (is_object($node)) {
      $node->redirection = $node->title;
      hosting_alias_update($node);
    }
  }

  return $ret;
}