[PATCH libinput 11/13] tablet: add assert that deltas are always 0

[Peter Hutterer]

The tablet axis struct has a delta field that's only useful for the events,
not for our internal axis handling. Make sure we never set it to anything
nonzero.

Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
---
 src/evdev-tablet.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/evdev-tablet.c b/src/evdev-tablet.c
index 1120598..413fb42 100644
--- a/src/evdev-tablet.c
+++ b/src/evdev-tablet.c
@@ -1479,6 +1479,9 @@ tablet_send_events(struct tablet_dispatch *tablet,
 		tablet_check_notify_axes(tablet, device, tool, &axes, time);
 	}
 
+	assert(tablet->axes.delta.x == 0);
+	assert(tablet->axes.delta.y == 0);
+
 	tablet_send_proximity_in(tablet, tool, device, &axes, time);
 	if (!tablet_send_tip(tablet, tool, device, &axes, time))
 		tablet_send_axes(tablet, tool, device, &axes, time);
-- 
2.9.3