Fix coasting for negative ScrollDelta
Fix coasting for negative ScrollDelta

Fix the coasting direction for when VertScrollDelta or HorizScrollDelta is
negative.

Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=49966

Regression introduced in 0de4445ff8e75aab208faf6383e76045934c6720

Signed-off-by: Chun Yang <4fbb8c96bf5f40f684cb651bd0e3ec0978a47d62@gmail.com>
Signed-off-by: Peter Hutterer <b9c50af7afa7642f6f854434cda9ffe54ece8b85@who-t.net>

mad-s/xf86-input-synaptics-absolute,mad-s/xf86-input-synaptics-absolute