catch the case when an object doesn't have get_absolute_url defined.
catch the case when an object doesn't have get_absolute_url defined.

claudep/django-linkcheck,claudep/django-linkcheck,DjangoAdminHackers/django-linkcheck,Ixxy-Open-Source/django-linkcheck-old,DjangoAdminHackers/django-linkcheck,Ixxy-Open-Source/django-linkcheck-old