The previous domain was too naive: a receipt is not always valued
(inter-warehouse transfer) and even a receipt that should be valued
isn't always (receive goods you do not own, change your config from
manual to automated and then apply the lc on an old receipt, etc.)

Enforce a domain making sure the transfer is valued.

related opw-2165697
task-2169844

closes odoo/odoo#43017

Signed-off-by: Simon Lejeune (sle) <sle@openerp.com>