Revert "Don't get page with 0 comment"

This reverts commit 4a5456b152.

This commit was here to bypass a bug of dlfp rss Atom.
The bug is fixed and the commit can be reverted.
Reference : http://linuxfr.org/suivi/855

modules/dlfp/backend.py

@@ -101,7 +101,7 @@ class DLFPBackend(BaseBackend, ICapMessages, ICapMessagesPost, ICapContent):
             # Check if we have seen all comments of this thread.
             oldhash = self.storage.get('hash', id, default="")
             newhash = self.browser.get_hash(thread._rsscomment)
-            if not getseen and (oldhash == newhash or newhash is None):
+            if not getseen and oldhash == newhash:
                 return None
             self.storage.set('hash', id, newhash)
             self.storage.save()