Hang on game exit on Linux

[PauloMorfeo]

Laptop with Optimus and NVidia,
Ubuntu 14.04 LTS,
Proprietary NVidia drivers installed be default by the OS (no Bumblebee, I believe).

Never experienced yet a hang on exit since I started messing with Spring again some weeks ago.
Sometimes, though, it kind of «hangs» on exit for a few seconds (ex: 15s).

[albator]

Test if "LoadingMT = 0" removes the hang at exit.

I tried, it does it less, I would say...

Still, it happens:

http://replays.springrts.com/replay/b80 ... a3b330d66/


http://pastebin.com/bPt29Zmw

[albator]

Test if "LoadingMT = 0" removes the hang at exit.

FYI, this is effective, it solved the issue almost completely (10% hang vs 80% hang before)