Code review comment for lp:~attente/unity/gnome-key-grabber

Thanks Marco! Cleaned up those issues.

> 1061 + CompScreen* screen_;
> FYI CompScreen is exported by <core/screen.h> as a global "screen" variable
> and is always available since the plugin initialization, so you can just use
> that reference if you want.

Thanks for the heads up, personally, I don't mind passing it down to the grabber.