Fix search on ir.model.data for new inherit field for issue394

invoice.py

@@ -2399,6 +2399,7 @@ class RefundInvoice(Wizard):
         model_data_ids = model_data_obj.search(cursor, user, [
             ('fs_id', '=', 'act_invoice_form'),
             ('module', '=', 'account_invoice'),
+            ('inherit', '=', False),
             ], limit=1, context=context)
         model_data = model_data_obj.browse(cursor, user, model_data_ids[0],
                 context=context)