erp5_payroll_l10n_fr: Minor fixup

 Don't add to total_contribution_relief if employer price is not set (None).

bt5/erp5_payroll_l10n_fr/SkinTemplateItem/portal_skins/erp5_payroll_l10n_fr/PaySheetTransaction_getPayslipData.py

@@ -142,6 +142,7 @@ for line_dict in line_dict_list:
         }
       else:
         if base_contribution == contribution_relief:
+          if line_dict['employer_price']:
             total_contribution_relief += (line_dict['base'] * line_dict['employer_price']) #line_dict['employer_total_price']
         elif base_contribution in (csg_crds_taxable_to_income_tax, csg_non_taxable_to_income_tax):
           csg_base = line_dict['base']