Unbreak build from #735 merge.

Now with more #ifdef.

app/modules/mqtt.c

@@ -1037,9 +1037,11 @@ static int mqtt_socket_close( lua_State* L )
   // Send disconnect message
   mqtt_message_t* temp_msg = mqtt_msg_disconnect(&mud->mqtt_state.mqtt_connection);
   NODE_DBG("Send MQTT disconnect infomation, data len: %d, d[0]=%d \r\n", temp_msg->length,  temp_msg->data[0]);
+#ifdef CLIENT_SSL_ENABLE
   if(mud->secure)
     espconn_secure_sent(mud->pesp_conn, temp_msg->data, temp_msg->length);
   else
+#endif
     espconn_sent(mud->pesp_conn, temp_msg->data, temp_msg->length);
 
   mud->mqtt_state.auto_reconnect = 0;   // stop auto reconnect.