Fix Copy/Paste error, thanks to romain courteaud

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@21064 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Security/__init__.py

@@ -40,7 +40,7 @@ def mergedLocalRoles(object):
         merged.setdefault(k, []).extend(v)
     # block acquisition
     if getattr(object, '_getAcquireLocalRoles', None) is not None:
-      if not object._getAcquireLocalRoles() is not None:
+      if not object._getAcquireLocalRoles():
         break
     if getattr(object, 'aq_parent', None) is not None:
       object = object.aq_parent