>> AttributeError: 'account.invoice.line' Model has no attribute
>> 'invoice_type': {'product': Pool().get('product.product')(10),
>> 'description': '', 'discount': Decimal('0'), 'currency':
>> Pool().get('currency.currency')(24), 'invoicfuerza/añade en la linia el campo invoice_type si no le pasas el campo invoice. http://hg.tryton.org/modules/account_invoice/file/fcb127e42fbc/invoice.py#l1421
