Prevent exception if it cannot find default module for a specific portal type.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@18295 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Tool/ContributionTool.py

@@ -277,7 +277,10 @@ class ContributionTool(BaseTool):
     if portal_type and container is None:
       # We know the portal_type, let us find the default module
       # and use it as container
+      try:
         container = self.getDefaultModule(portal_type)
+      except ValueError:
+        container = None
 
     if portal_type and container is not None:
       # We could simplify things here and return a document immediately