[Xcb] Notification on resolution changes

[Ulrich Eckhardt]

Dear Intarweb!

I have a desktop switcher program that is attached to the corners of the 
screen and sensitive to mousewheel movements there. When I start some games, 
they temporarily change the screen's resolution, which seems to move those 
windows, too. What I'm looking for is an elegant way to handle changes to the 
screen's resolution. I could simply poll this value, but that seems kind of 
ugly to me. Any better ideas?

Greetings from Hamburg!

Uli