templates: make sure we don't call register routes if this function is not defined.

- prevents simple JS errors on 4XX and 5XX pages.

rhodecode/public/js/src/rhodecode/init.js

@@ -1,26 +1,29 b''
 // # Copyright (C) 2010-2017 RhodeCode GmbH
 // #
 // # This program is free software: you can redistribute it and/or modify
 // # it under the terms of the GNU Affero General Public License, version 3
 // # (only), as published by the Free Software Foundation.
 // #
 // # This program is distributed in the hope that it will be useful,
 // # but WITHOUT ANY WARRANTY; without even the implied warranty of
 // # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 // # GNU General Public License for more details.
 // #
 // # You should have received a copy of the GNU Affero General Public License
 // # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 // #
 // # This program is dual-licensed. If you wish to learn more about the
 // # RhodeCode Enterprise Edition, including its added features, Support services,
 // # and proprietary license terms, please see https://rhodecode.com/licenses/
 
 
 /*
  * Deferred functions that must run before any rhodecode javascript go here
  */
 
+
+if (typeof window['registerRCRoutes'] != 'undefined') {
 registerRCRoutes();
+}
 
 // TODO: move i18n here