[FIX] website_sale: force to get a pricelist to avoid traceback
[FIX] website_sale: force to get a pricelist to avoid traceback

If a user or a bot arrive on /checkout, /cart or other routes which
call sale_get_order without browse other ecommerce page.
None pricelist was selected by default

Avoid crash when standard workflow of ecommerce is not followed.

bplancher/odoo,dfang/odoo,sysadminmatmoz/OCB,stephen144/odoo,Elico-Corp/odoo_OCB,bplancher/odoo,storm-computers/odoo,sysadminmatmoz/OCB,stephen144/odoo,microcom/odoo,hip-odoo/odoo,microcom/odoo,Elico-Corp/odoo_OCB,ygol/odoo,laslabs/odoo,stephen144/odoo,microcom/odoo,laslabs/odoo,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,hip-odoo/odoo,Elico-Corp/odoo_OCB,microcom/odoo,sysadminmatmoz/OCB,dfang/odoo,storm-computers/odoo,storm-computers/odoo,dfang/odoo,bplancher/odoo,hip-odoo/odoo,stephen144/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,dfang/odoo,hip-odoo/odoo,ygol/odoo,microcom/odoo,laslabs/odoo,laslabs/odoo,sysadminmatmoz/OCB,ygol/odoo,storm-computers/odoo,dfang/odoo,laslabs/odoo,dfang/odoo,laslabs/odoo,bplancher/odoo,microcom/odoo,storm-computers/odoo,sysadminmatmoz/OCB,hip-odoo/odoo,ygol/odoo,storm-computers/odoo,hip-odoo/odoo,bplancher/odoo,ygol/odoo,ygol/odoo,stephen144/odoo,sysadminmatmoz/OCB,sysadminmatmoz/OCB,ygol/odoo,stephen144/odoo