[FIX] account: fix to_check warning being thrown when opening reconciliation widget

In the reconciliation widget, we added a to_check functionality. However in some cases, the propositions don't have a default value for
to_check, which result in a warning being thrown when doing a comparison to ensure that all lines have the same to_check value.
This commit add a default value to to_check for all propositions (when loading the data and when performing a quick create).

closes odoo/odoo#33824

Signed-off-by: Cedric Snauwaert (csn) <csn@openerp.com>

addons/account/static/src/js/reconciliation/reconciliation_model.js

@@ -994,6 +994,7 @@ var StatementModel = BasicModel.extend({
                 prop.label = prop.name;
                 prop.account_id = self._formatNameGet(prop.account_id || line.account_id);
                 prop.is_partially_reconciled = prop.amount_str !== prop.total_amount_str;
+                prop.to_check = !!prop.to_check;
             });
         }
     },
@@ -1128,7 +1129,7 @@ var StatementModel = BasicModel.extend({
             'link': values.link,
             'display': true,
             'invalid': true,
-            'to_check': values.to_check,
+            'to_check': values.to_check || false,
             '__tax_to_recompute': true,
             'is_tax': values.is_tax,
             '__focus': '__focus' in values ? values.__focus : true,
@@ -1614,6 +1615,7 @@ var ManualModel = StatementModel.extend({
                 prop.debit = prop.debit !== 0 ? 0 : tmp_value;
                 prop.amount = -prop.amount;
                 prop.journal_id = self._formatNameGet(prop.journal_id || line.journal_id);
+                prop.to_check = !!prop.to_check;
             });
         }
     },