fixup create data ingestion

bt5/erp5_wendelin/SkinTemplateItem/portal_skins/erp5_wendelin/ERP5Site_createDataIngestion.py

@@ -50,7 +50,8 @@ for supply_line in composed.objectValues(
 
 # start ingestion only if data supply is validated
 data_supply_validated = True
-for specialise in specialise_list:
+for specialise_path in specialise_list:
+  specialise = portal.restrictedTraverse(specialise_path)
   if specialise.getPortalType() == "Data Supply":
     if specialise.getValidationState() != "validated":
       data_supply_validated = False