[bug] Screen sharing Android->client gnome causes a "bus error"

I made a video call from Android client version 20191208 to Gnome client version 20191217 or 20191224, turned on and off screen sharing on Android a few times and then closed the screen sharing. This made the gnome client to close and throw "31452 Bus error", Android client was fine though. I tested this only on Guix System with with the package I made. Patches for pjproject and ffmpeg were applied correctly, we use the 3.6.9 version instead of 3.6.10 though, don't know if it's a problem, but I can test it soon.