xcb-util/icccm: also worth a look

I've forgotten this one:

http://lists.freedesktop.org/archives/xcb/2010-March/005653.html

http://www.mini-dweeb.org/~arnau/coding/patches/0001-The-reply-type-could-be-XCB_NONE-if-the-property-is-.patch

Maybe it's worth of consideration, although has not been committed yet.

cheers,
david