touchpad: switch from fabs() to abs()
silence clang warning: evdev-mt-touchpad.c:1017:7: warning: using floating point absolute value function 'fabs' when argument is of integer type [-Wabsolute-value] Signed-off-by:Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by:
Hans de Goede <hdegoede@redhat.com> Reviewed-by:
Eric Engestrom <eric.engestrom@imgtec.com>
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