message: fix: empty endpoint
diff: @@ -835,7 +835,7 @@ Gateway.prototype.valueTopic = function (node, valueId, returnObject = false) {
  topic.push(node.name ? node.name : NODE_PREFIX + valueId.nodeId)
  }
  topic.push(valueId.commandClass)
  - topic.push(valueId.endpoint)
  + topic.push(valueId.endpoint || '0')
  topic.push(valueId.property)
  if (valueId.propertyKey) {
  topic.push(valueId.propertyKey)
  