Merge pull request #1104 from matrix-org/markjh/direct_to_device_federation_sync

Fix direct to device messages recieved over federation to notify sync

synapse/storage/deviceinbox.py

@@ -128,6 +128,8 @@ class DeviceInboxStore(SQLBaseStore):
                     user_id, stream_id
                 )
 
+        defer.returnValue(stream_id)
+
     def _add_messages_to_local_device_inbox_txn(self, txn, stream_id,
                                                 messages_by_user_then_device):
         sql = (