ctucx.git: mqtt-webui

webui.js: don't crash if message isn't json

diff --git a/src/webui.js b/src/webui.js
@@ -40,7 +40,9 @@ const transformMessage = (input, meta) => {
 }
 
 const onMessage = (topic, message) => {
-	message = JSON.parse(message.toString());
+	try {
+		message = JSON.parse(message.toString());
+	} catch(e) { }
 
 	document.querySelectorAll('[data-mqtt-topic="' + topic + '"]').forEach((element) => {
 		let value = null;