[FIX] sale: stop browsing recordset
[FIX] sale: stop browsing recordset

`currency_id` variable is a recordset, so stop browsing it again !
In the meantime, if those variable had a meaningfull name, this
error would never occured !
Coming from 7a282c99655d4f154ac1808fcb8a70339dc70930

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