From da82ad86fdf4dd4ace772f791c966746c5c2ebcb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Fri, 1 Jul 2022 14:46:34 +0200
Subject: [PATCH] Add empty slots to AbstractMixin

It is not detected by the standard test because it is registered as mixin.
---
 sale_reporting.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sale_reporting.py b/sale_reporting.py
index 8839e94cb7..d6f51085f5 100644
--- a/sale_reporting.py
+++ b/sale_reporting.py
@@ -7,6 +7,7 @@ from trytond.pool import Pool
 
 
 class AbstractMixin:
+    __slots__ = ()
 
     @classmethod
     def _pos_sale_line(cls, length, index, company_id=None):