Test if origin id is greater or equals to 0 before accessing the target record name

Closes #13498
(grafted from ca37026b228e56df6ed3455005a6bcd23a5665f0)

--HG--
branch : 7.0

modules/account_invoice/invoice.py

@@ -2456,7 +2456,8 @@ class InvoiceLine(sequence_ordered(), ModelSQL, ModelView, TaxableMixin):
     def origin_name(self):
         if isinstance(self.origin, self.__class__) and self.origin.id >= 0:
             return self.origin.invoice.rec_name
-        return self.origin.rec_name if self.origin else None
+        if self.origin and self.origin.id >= 0:
+            return self.origin.rec_name
 
     @classmethod
     def default_taxes_deductible_rate(cls):