samples/mqtt_azure: descriptor not set on non secure transport

[fgervais]

In the mqtt_azure sample, the socket descriptor is only set when using secure mqtt transport:

zephyr/samples/net/cloud/mqtt_azure/src/main.c

Line 91 in 026dbdf

fds[0].fd = client->transport.tls.sock;

What happens then when not using the secure transport?
On what are we waiting for in the wait() function?

[kartben]

mmmm this doesn't make much sense to have an if there since it's always going to be a secure connection (https://github.com/zephyrproject-rtos/zephyr/blob/main/samples/net/cloud/mqtt_azure/src/main.c#L179, and IoT Hub doesn't support non-TLS anyway)
Did you want to maybe submit a patch?

[fgervais]

Thank you for your input.

I took a note, if I have an opening I send a PR for this.