UserTool: raise correct error (HTTPError)

vispa/tools/user.py

@@ -67,7 +67,7 @@ class UserTool(cherrypy.Tool):
                     logger.debug("Redirect %s" % url)
                     raise cherrypy.HTTPRedirect(url)
                 else:
-                    raise AjaxException(401)
+                    raise cherrypy.HTTPError(401)
 
             cherrypy.serving.request.handler = handler