Make sure value is always set for computed fields

(without these a CacheMiss error is thrown by odoo)

report_py3o_fusion_server/models/ir_actions_report.py

@@ -46,6 +46,8 @@ class IrActionsReport(models.Model):
     )
     def _compute_py3o_report_not_available(self):
         for rec in self:
+            rec.is_py3o_report_not_available = False
+            rec.msg_py3o_report_not_available = ""
             if not rec.report_type == "py3o":
                 continue
             if (