Fix raise the timeout close code as an int

Author: lgrahl

saltyrtc/server/server.py

@@ -213,7 +213,7 @@ def handler(self):
             client.log.info('Closing because of a ping timeout')
             close_future = client.close(CloseCode.timeout)
             self._server.raise_event(
-                Event.disconnected, hex_path, CloseCode.timeout)
+                Event.disconnected, hex_path, CloseCode.timeout.value)
         except SlotsFullError as exc:
             client.log.notice('Closing because all path slots are full: {}', exc)
             close_future = client.close(code=CloseCode.path_full_error.value)