Modified start_coasting to handle circular scrolling
Modified start_coasting to handle circular scrolling

Calculate the angle speed when circular scrolling is on and coast based on
that speed instead of the previously used vertical scroll speed.

Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=30756

Signed-off-by: Patrick Curran <4d75f43080ab41bfe164b50a0b33f9e85a2927dc@wisc.edu>
Reviewed-by: Peter Hutterer <b9c50af7afa7642f6f854434cda9ffe54ece8b85@who-t.net>
Signed-off-by: Peter Hutterer <b9c50af7afa7642f6f854434cda9ffe54ece8b85@who-t.net>

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