Fix: Set default count of extra reports. (Redmine issue: #7627)

lib/mentat/stats/idea.py

@@ -429,6 +429,11 @@ def aggregate_stats_reports(report_list, dt_from, dt_to, result = None):
     # Precalculate list of timeline keys for further bisection search.
     tl_keys = [x[0] for x in result[ST_SKEY_TIMELINE]]
 
+    # Set the default count of report types to 0. Fixes issue #7627.
+    for report_type_key in (ST_SKEY_CNT_REPS_S, ST_SKEY_CNT_REPS_E):
+        if report_type_key not in result:
+            result[report_type_key] = 0
+
     for report in report_list:
         report_ct = report.createtime