Bug#994969: jackd2: segfaults after today's upgrade of other Debian testing packages

[Ryan Thoryk]

Upstream made a couple of commits which fix the Jack issue for me:
https://gitlab.gnome.org/GNOME/glibmm/-/commit/b67b77cb8cd37a7ec33ad15702831ab45ced7f64
https://gitlab.gnome.org/GNOME/glibmm/-/commit/f8b8e70fee19487df19019b4f8810715a7c77ad0

nospam at kota.moe also made some test code that triggers the bug, the bug 
goes away after commits.

-- 
Ryan Thoryk
ryan at thoryk.com
ryan at tliquest.net