Fix événements sans image dans l'ical

src/agenda_culturel/models.py

@@ -1704,7 +1704,7 @@ class Event(models.Model):
             eventIcal.add(
                 "description", description + url
             )
-            if not event.local_image is None:
+            if not event.local_image is None and event.local_image != "":
                 eventIcal.add('image', request.build_absolute_uri(event.local_image), parameters={'VALUE': 'URI'})
             eventIcal.add("location", event.exact_location or event.location)