Extend carrier form only if incoterm module is activated

Closes #12233

modules/account_stock_eu/carrier.xml

@@ -2,7 +2,7 @@
 <!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
 this repository contains the full copyright notices and license terms. -->
 <tryton>
-    <data depends="carrier">
+    <data depends="carrier,incoterm">
         <record model="ir.ui.view" id="carrier_view_form">
             <field name="model">carrier</field>
             <field name="inherit" ref="carrier.carrier_view_form"/>