logger: fix import of TraversalError

wcs/qommon/admin/logger.py

@@ -21,7 +21,7 @@ from quixote import get_publisher, get_request, get_response
 from quixote.html import htmltext, TemplateIO
 from quixote.directory import Directory
 
-from qommon import logger
+from qommon import logger, errors
 from qommon.admin.menu import html_top, error_page
 
 class ByUserDirectory(Directory):
@@ -172,7 +172,7 @@ class ByUserPages(Directory):
         try:
             self.user = get_publisher().user_class.get(component)
         except KeyError:
-            raise TraversalError()
+            raise errors.TraversalError()
 
     def _q_index(self):
         html_top('logger', title = _('Logs'))