If the account of the creator of an order has been deleted we should
return undef here, instead of crashing with
GET /api/v1/acquisitions/orders: unhandled exception (Mojo::Exception)<<DBIC result _type isn't of the _type Borrower at /kohadevbox/koha/Koha/Objects.pm line 445.
Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
1c3a35418e