[FIX] account: bug which blows up in P3
[FIX] account: bug which blows up in P3

In P2, list comprehensions "leak" their variables to the surrounding
scope, in this case leading to "stl" from the first listcomp being
visible to the second one leading to code which does not break but
does not seem to make any sense.

/cc @csn-odoo

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