Fixed wrong field name in OpenSaleOrder_view. Sorry I forgot to commit this part.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@25588 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_trade/SkinTemplateItem/portal_skins/erp5_trade/OpenSaleOrder_view.xml

@@ -117,7 +117,7 @@
                         <string>my_incoterm</string>
                         <string>my_delivery_mode</string>
                         <string>my_specialise_title</string>
-                        <string>my_forecasting_term_days</string>
+                        <string>my_forecasting_term_day_count</string>
                       </list>
                     </value>
                 </item>