Message.channel's Object instance has an is_private attribute now.

This was to allow for basic checks such as message.channel.is_private
to succeed at the very least. It is a very small mitigation and not
perfect since it doesn't have every attribute that PrivateChannel
itself has. However you could retrieve the user info through the
Message.author attribute.

discord/message.py

@@ -62,6 +62,8 @@ class Message(object):
 
         The :class:`Channel` that the message was sent from. Could be a :class:`PrivateChannel` if it's a private message.
         In :issue:`very rare cases <21>` this could be a :class:`Object` instead.
+
+        For the sake of convenience, this :class:`Object` instance has an attribute ``is_private`` set to ``True``.
     .. attribute:: server
 
         The :class:`Server` that the message belongs to. If not applicable (i.e. a PM) then it's None instead.
@@ -157,7 +159,8 @@ class Message(object):
         self.server = None
         if self.channel is None:
             if channel_id is not None:
-                self.channel = Object(channel_id)
+                self.channel = Object(id=channel_id)
+                self.channel.is_private = True
             return
 
         if not self.channel.is_private: