server/input: add test for XI 1.x valuator 1 data
server/input: add test for XI 1.x valuator 1 data

Server had a bug that didn't fill in that data correctly for missing
valuators between first and num_valuators.

Signed-off-by: Peter Hutterer <b9c50af7afa7642f6f854434cda9ffe54ece8b85@who-t.net>

freedesktop-unofficial-mirror/xorg__test__xorg-integration-tests,freedesktop-unofficial-mirror/xorg__test__xorg-integration-tests,freedesktop-unofficial-mirror/xorg__test__xorg-integration-tests