Skip if no media_id is set for release

fix #5087

couchpotato/core/plugins/renamer.py

@@ -966,6 +966,7 @@ Remove it if you want it to be renamed (again, or at least let it try again)
 
             try:
                 for rel in rels:
+                    if not rel.get('media_id'): continue
                     movie_dict = db.get('id', rel.get('media_id'))
                     download_info = rel.get('download_info')