update partner_view

serve per evitare l'errore segnalato nella issue #56

account_vat_dichiarazioni_intento/partner/partner_view.xml

@@ -5,7 +5,8 @@
             <field name="name">partner.vat.dichiarazioni.intento</field>
             <field name="model">res.partner</field>
             <field name="inherit_id" ref="base.view_partner_form"/>
-            <field name="type">form</field> 
+            <field name="type">form</field>
+            <field name="groups_id" eval="[(4, ref('account.group_account_invoice'))]"/>
             <field name="arch" type="xml">
                 <xpath expr="//field[@name='property_payment_term']/../.." position="after">
                     <group string="Dichiarazione intento">
@@ -25,4 +26,4 @@
             </field>
         </record>
     </data>
-</openerp>
+</openerp>