topicaliases.TAHandler does not send a topic on first publish

[shirou]

Describe the bug

When using topicaliases.TAHandler to publish, the server disconnects. The ReasonCode is 0x82, indicating a Protocol Error.

I believe this issue occurs because the TAHandler does not send the topic when the alias does not exist, It should send the topic in the first publish.

To reproduce

	ta := topicaliases.NewTAHandler(maxTopicAlias)
	cliCfg := autopaho.ClientConfig{
		ConnectPacketBuilder: func(c *paho.Connect, u *url.URL) *paho.Connect {
			m := uint16(maxTopicAlias)
			c.Properties = &paho.ConnectProperties{
				TopicAliasMaximum: &m,
			}
			return c
		},
		ClientConfig: paho.ClientConfig{
		(snip)
			PublishHook: ta.PublishHook,
		},
	}

and Publish the message.

Expected behaviour

Server does not disconnect and publish successed.

Software used:

• Server : AWS IoT Core
• Client version : github.com/eclipse/paho.golang v0.21.0