fix: ensure notification count defaults to zero if not present

Author: MudDev

plugins/Notification/NotificationPlugin.py

@@ -161,7 +161,7 @@ def actionNotificationQuery(self, to):
                     row = next(res, None)
                     if row:
                         row = dict(row)
-                        count = row.get("count", row.get("COUNT(*)", 0))
+                        count = row.get("count", row.get("COUNT(*)", 0)) or 0
                     else:
                         count = 0