dont use getToolByName, dont crash if portal_membership isnt here.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@42363 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Utils.py

@@ -1211,8 +1211,8 @@ def createExpressionContext(object, portal=None):
         folder = aq_parent(aq_inner(folder))
 
   if portal is not None:
-    pm = getToolByName(portal, 'portal_membership')
-    if pm.isAnonymousUser():
+    pm = getattr(portal, 'portal_membership', None)
+    if pm is None or pm.isAnonymousUser():
       member = None
     else:
       member = pm.getAuthenticatedMember()