Fix a bug if you have no roles at all This could not happen currently, but might happen later on if a group is defined that does not have an 'anybody' membership. Patch by: Sverre Rabbelier

# Geo-enabled Sitemap classes.
from django.contrib.gis.sitemaps.georss import GeoRSSSitemap
from django.contrib.gis.sitemaps.kml import KMLSitemap, KMZSitemap