[FIX] sale: flush field newly used in the query

In commit c04e7887, a new condition was added in the query in
AccountReconciliation._get_sales_order, which uses the computed field
amount_total. However, this field was not flushed in the previous line,
which may lead to inconsistent behaviors (at least in a test in
saas-13.2).

closes odoo/odoo#47929

Signed-off-by: Olivier Dony (odo) <odo@openerp.com>

addons/sale/models/account_reconciliation_widget.py

@@ -11,7 +11,8 @@ class AccountReconciliation(models.AbstractModel):
         if not stl_ids:
             return res
         # Search if we can find a sale order line that match the statement reference
-        self.env['sale.order'].flush(['name', 'reference', 'invoice_status', 'company_id', 'state', 'partner_id'])
+        self.env['sale.order'].flush(['name', 'reference', 'invoice_status', 'company_id',
+                                      'state', 'partner_id', 'amount_total'])
         self.env['account.bank.statement.line'].flush(['name', 'partner_id'])
         sql_query = """
             SELECT stl.id, array_agg(o.id) AS order_id, stl.partner_id, array_agg(o.partner_id) as order_partner