AttributeError: 'CustomImage' object has no attribute 'live'

[sentryliqd]

Sentry Issue: DIGITALSTRATEGIE-AB

AttributeError: 'CustomImage' object has no attribute 'live'
(13 additional frame(s) were not displayed)
...
  File "apps/contrib/elasticsearch.py", line 57, in _get_results_from_hits
    if not obj.live or obj.get_view_restrictions().exists():

Searching for images in wagtail fails, we should maybe add a check (e.g. hasattr() or something )