touchpad: tp_current_touch: Fix off by one error

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

diff --git a/src/evdev-mt-touchpad.c b/src/evdev-mt-touchpad.c
index 0294eb2bb95da446b53305b91a428eea72a9f226..92e0651a5fd59d749c45ac2335a8bbc34bcf3f5b 100644 (file)
--- a/src/evdev-mt-touchpad.c
+++ b/src/evdev-mt-touchpad.c
@@ -139,7 +139,7 @@ tp_motion_history_reset(struct tp_touch *t)
 static inline struct tp_touch *
 tp_current_touch(struct tp_dispatch *tp)
 {
-       return &tp->touches[min(tp->slot, tp->ntouches)];
+       return &tp->touches[min(tp->slot, tp->ntouches - 1)];
 }
 
 static inline struct tp_touch *