[FIX] l10n_fr_fec: evaluation of unaffected earning line
[FIX] l10n_fr_fec: evaluation of unaffected earning line

Change the condition from
  [...] and debit != and credit != 0
to
  [...] and (debit != or credit != 0)

as at least one of debit or credit may have an unaffected value

Without this patch a past unpaid entry will not be included in the report.

Closes #15550

ygol/odoo,hip-odoo/odoo,Elico-Corp/odoo_OCB,ygol/odoo,ygol/odoo,ygol/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,ygol/odoo,bplancher/odoo,hip-odoo/odoo,hip-odoo/odoo,hip-odoo/odoo,ygol/odoo,bplancher/odoo,bplancher/odoo,ygol/odoo,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,hip-odoo/odoo,hip-odoo/odoo,Elico-Corp/odoo_OCB,bplancher/odoo,bplancher/odoo,Elico-Corp/odoo_OCB