[FIX] account: reconciled with forced amount_currency

This is possible to create bank statements
forcing the amount in the foreign currency,
along with the bank account currency, and therefore
to force the foreign currency rate.

In such a case, when reconciling the journal items,
the currency rate conversion must not be done
against the currency rates written in database,
in the rates records, at that date, but with
the rate that was forced in the bank statement.

opw-676048

addons/account/models/account_move.py

@@ -253,12 +253,16 @@ class AccountMoveLine(models.Model):
 
                 amount += sign_partial_line * partial_line.amount
                 #getting the date of the matched item to compute the amount_residual in currency
-                date = partial_line.credit_move_id.date if partial_line.debit_move_id == line else partial_line.debit_move_id.date
                 if line.currency_id:
                     if partial_line.currency_id and partial_line.currency_id == line.currency_id:
                         amount_residual_currency += sign_partial_line * partial_line.amount_currency
                     else:
-                        amount_residual_currency += sign_partial_line * line.company_id.currency_id.with_context(date=date).compute(partial_line.amount, line.currency_id)
+                        if line.balance and line.amount_currency:
+                            rate = line.amount_currency / line.balance
+                        else:
+                            date = partial_line.credit_move_id.date if partial_line.debit_move_id == line else partial_line.debit_move_id.date
+                            rate = line.currency_id.with_context(date=date).rate
+                        amount_residual_currency += sign_partial_line * line.currency_id.round(partial_line.amount * rate)
 
             #computing the `reconciled` field. As we book exchange rate difference on each partial matching,
             #we can only check the amount in company currency