bug#56652: Gajim 1.4.6: Voice calls no longer work

[Joseph Turner]

I'm running Gajim 1.4.6 (thank you to whomever just packaged this latest
version) installed with Guix on a foreign distro (Debian bullseye).

Click on the "Start Voice Call" button on a contact which can receive calls.
The interface box appears, saying "Calling...", then after a few
seconds, says "Call ended" and then the box disappears. Calls worked
okay on the previous major version of Gajim (1.3.x).

Thank you for packaging 1.4.6 - it looks great!

Joseph