[FIX] base: traceback on pdf read error

Create a vendor bill with a specific attachment (on ticket)
Go to vendor bill list view
Select the created bill and another one
Print > Original Bills

Traceback due to unhandled ValueError on pdf read

opw-3420507

closes odoo/odoo#128454

Signed-off-by: Julien Castiaux (juc) <juc@odoo.com>