Fixed the case where a folder has allow_discussion=False and

conversation.enabled() on a document in this folder returned False
instead of True because of allow_discussion acquisition.

svn path=/plone.app.discussion/trunk/; revision=38835

plone/app/discussion/conversation.py

@@ -127,7 +127,7 @@ class Conversation(Traversable, Persistent, Explicit):
         obj = aq_parent(self)
 
         # If discussion is disabled for the object, bail out
-        obj_flag = getattr(obj, 'allow_discussion', None)
+        obj_flag = getattr(aq_base(obj), 'allow_discussion', None)
         if obj_flag is False:
             return False