Fix voice states being overwritten after a GUILD_SYNC.

This was a two-fold problem. The first of which involved the overwriting
of members during a GUILD_SYNC. Since we are requesting a chunk anyway,
we have all the member references we need without actually chunking. The
second problem came from the order. We were doing a GUILD_SYNC and then
doing the chunking requests. We should do the GUILD_SYNC after the
chunking in order to just update presences.

discord/state.py

@@ -186,6 +186,10 @@ class ConnectionState:
         # remove the state
         del self._ready_state
 
+        # call GUILD_SYNC after we're done chunking
+        if not self.is_bot:
+            compat.create_task(self.syncer([s.id for s in self.servers]), loop=self.loop)
+
         # dispatch the event
         self.dispatch('ready')
 
@@ -200,9 +204,6 @@ class ConnectionState:
             if server.large or not self.is_bot:
                 servers.append(server)
 
-        if not self.is_bot:
-            compat.create_task(self.syncer([s.id for s in self.servers]), loop=self.loop)
-
         for pm in data.get('private_channels'):
             self._add_private_channel(PrivateChannel(id=pm['id'],
                                      user=User(**pm['recipient'])))