show the second "login to comment"-button (below the comments) only when there are replies.

svn path=/plone.app.discussion/trunk/; revision=27198

plone/app/discussion/browser/comments.pt

@@ -86,7 +86,7 @@
     </div>
 
     <div class="reply"
-         tal:condition="isAnon">
+         tal:condition="python: isAnon and replies">
         <form tal:attributes="action view/login_action">
             <input class="standalone"
                    style="margin-bottom: 1.25em;"

plone/app/discussion/browser/comments.py

@@ -61,7 +61,11 @@ class CommentsViewlet(ViewletBase):
     def get_replies(self):
         # Return all direct replies
         conversation = conversationAdapterFactory(self.context)
-        return conversation.getThreads()
+
+        if conversation.total_comments > 0:
+            return conversation.getThreads()
+        else:
+            return False
 
     def is_anonymous(self):
         return self.portal_state.anonymous()