prevent "bad operand type for unary -" TypeErrors when total_price is None

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@21630 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_payroll/SkinTemplateItem/portal_skins/erp5_payroll/AccountingTransactionModule_getPaySheetLineReportSectionLineList.xml

@@ -129,7 +129,7 @@ base_total = 0\n
 \n
 i = 0\n
 for inventory in employee_inventory_list:\n
-  price = - inventory.total_price or 0\n
+  price = - (inventory.total_price or 0)\n
   movement = inventory.getObject()\n
   employee = movement.getDestinationValue()\n
   salary_range = movement.getSalaryRange()\n
@@ -149,7 +149,7 @@ for inventory in employee_inventory_list:\n
   base_total += inventory.quantity\n
 \n
 for inventory in employer_inventory_list:\n
-  price = - inventory.total_price or 0\n
+  price = - (inventory.total_price or 0)\n
   movement = inventory.getObject()\n
   employee = movement.getDestinationValue()\n
   salary_range = movement.getSalaryRange()\n

bt5/erp5_payroll/bt/revision

-288
\ No newline at end of file
+291
\ No newline at end of file