[FIX] survey: fix traceback for "Print" button
[FIX] survey: fix traceback for "Print" button

Oversight of 755ac5f313fd16031728055530db8ed7260acef8 .

closes odoo/odoo#41957

Signed-off-by: Thibault Delavallee (tde) <2d325771bb6e8870d87f0f3f7b45589a8338e550@openerp.com>

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo