[gitg] Bug #653611

[William Swanson <swansontec gmail com>]

Hi there, I've had a simple two-line patch sitting in bugzilla for
several months now, and was wondering if anybody could take a look at
it:

https://bugzilla.gnome.org/show_bug.cgi?id=653611

Basically, the program wasn't saving its window layout when the
File->Quit menu item caused it to exit. This patch fixes the behavior
so the program always saves its window layout on exit. It's not a big
change, but it would make the program a little nicer for everyday use.

-William