fixup! Resource: add property needed to calculate sliced price

product/ERP5/Document/Resource.py

@@ -712,6 +712,7 @@ class Resource(XMLObject, XMLMatrix, VariatedMixin):
         'non_discountable_additional_price': [],
         'priced_quantity': None,
         'base_unit_price': None,
+        'sliced_base_price_list': [],
         'sliced_quantity_range_list': [],
       }
       if mapped_value is None: