hotfix - image with no tags

Author: cccs-rs

assemblyline_core/updater/helper.py

@@ -63,7 +63,7 @@ def _get_proprietary_registry_tags(self, server, image_name, auth, verify):
                 resp = requests.get(url, headers=headers, verify=verify)
 
         if resp.ok:
-            return [tag['name'] for image in resp.json() for tag in image['tags']]
+            return [tag['name'] for image in resp.json() if image['tags'] for tag in image['tags']]
         return []