[Bug 35525] Integration with Steam for Linux

http://bugs.winehq.org/show_bug.cgi?id=35525

--- Comment #2 from Maurizio Oliveri  ---
The screenshot isn't taken from the game, but via Steam overlay, which means it
somehow gets the wrong input from the game's window, or messes it up.

Sorry, I realize I kinda forgot to add more info...
To try it out: launch the native Steam client for Linux, add a non-Steam game
and then add a game launched via Wine. The overlay works fine, but screenshots
appear upside-down, so Wine and Steam, somehow, aren't communicating that well,
messing up screen informations