Make swap event handling match the spec

[Jesse Barnes]

On Tue,  3 May 2011 12:21:23 -0700
Jesse Barnes <jbarnes at virtuousgeek.org> wrote:

> Ian reminded me that we changed the spec to fit within an XEvent, but we
> never updated the code to match.  This set of patches (much simpler than
> the last) does just that.  Wrapping support can be added to Mesa if we
> really want 64 bit values, but that means checking the drawable sbc and
> adding whenver sbc hits 0.

Apparently I've confused git send-email...  3/4 and 4/4 are for the
server and 5/6 and 6/6 are for Mesa.

-- 
Jesse Barnes, Intel Open Source Technology Center