Fix: Add dictionary key. (Redmine issue: #6227)

lib/mentat/reports/event.py

@@ -239,6 +239,7 @@ class EventReporter(BaseReporter):
                 group_chain = groups[0]
                 if group_chain not in result:
                     result[str(group_chain)] = {}
+                    result[str(group_chain)]['evcount_all'] = 0
                 result[str(group_chain)]['evcount_rlp'] = len(events_rel[groups])
                 result[str(group_chain)]['evcount_all'] += result[str(group_chain)]['evcount_rlp'] 
                 if groups not in events: