xfree86: Bump ABI versions (video: 19, extension: 9)

Among other things, commit b851ca968b7cce6d1a6438c05d3d5c8832249704 added a
NameWindowPixmap function pointer to ScreenRec, shifting some of the fields
around.

Signed-off-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
Fix present_notify to return right away when querying current or past msc.

When the target msc is past or is the current one, we want to get immediate
feedback. This patch fixes this behaviour.

Signed-off-by: Axel Davy <axel.davy@ens.fr>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>