Agregar nro de secuencia de ñandetv.

views/account_voucher_view.xml

@@ -7,7 +7,7 @@
       <field name="inherit_id" ref="account_voucher.view_vendor_receipt_form"/>
       <field name="arch" type="xml">
       <field name="journal_id" position="before">
-          <field name="seq_invoice"/>
+          <field name="seq_invoice" readonly="1"/>
           </field>
       </field>
     </record>
@@ -22,6 +22,6 @@
             </field>
         </field>
     </record>
-    
+
  </data>
 </openerp>