[FIX] account: writeoff_account_id not required if no difference

opw-2152644
Do not set the field writeoff_account_id as required if the
payment_difference is zero because there is no writeoff in that case and
the field is invisible.

closes #45155

X-original-commit: 0eafca6
Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

addons/account/views/account_payment_view.xml

@@ -176,9 +176,9 @@
                                     <field name="payment_difference_handling" widget="radio" nolabel="1"/>
                                     <div attrs="{'invisible': [('payment_difference_handling','=','open')]}">
                                         <label for="writeoff_account_id" class="oe_edit_only" string="Post Difference In"/>
-                                        <field name="writeoff_account_id" options="{'no_create': True}" string="Post Difference In" attrs="{'required': [('payment_difference_handling', '=', 'reconcile')]}"/>
+                                        <field name="writeoff_account_id" options="{'no_create': True}" string="Post Difference In" attrs="{'required': [('payment_difference_handling', '=', 'reconcile'), ('payment_difference', '!=', 0.0)]}"/>
                                         <label for="writeoff_label" class="oe_edit_only" string="Label"/>
-                                        <field name="writeoff_label" attrs="{'required': [('payment_difference_handling', '=', 'reconcile')]}"/>
+                                        <field name="writeoff_label" attrs="{'required': [('payment_difference_handling', '=', 'reconcile'), ('payment_difference', '!=', 0.0)]}"/>
                                     </div>
                                 </div>
                             </group>