[FIX] sale_timesheet: use existing field

Oversight of previous forward-port

addons/sale_timesheet/models/account_invoice.py

@@ -95,7 +95,7 @@ class AccountInvoice(models.Model):
                             if index+1 != len(no_zero_timesheet_revenue):
                                 price_subtotal_inv = invoice_line.currency_id.compute(invoice_line.price_subtotal, timesheet_line.currency_id)
                                 price_subtotal_sol = timesheet_line.so_line.currency_id.compute(timesheet_line.so_line.price_subtotal, timesheet_line.currency_id)
-                                if not float_is_zero(price_subtotal_sol, precision_rounding=timesheet_line.company_currency_id.rounding):
+                                if not float_is_zero(price_subtotal_sol, precision_rounding=timesheet_line.currency_id.rounding):
                                     line_revenue = timesheet_line.timesheet_revenue * price_subtotal_inv / price_subtotal_sol
                                     total_revenue_per_currency[timesheet_line.currency_id.id] += line_revenue
                                 else: