Patch to disable tablet smoothing in libinput (https://gitlab.freedesktop.org/libinput/libinput/issues/225)

libinput-1.14.1-disable-tablet-smoothing.patch

--- a/src/evdev-tablet.c
+++ b/src/evdev-tablet.c
@@ -741,7 +741,6 @@ out:
 	}
 
 	tablet_history_push(tablet, &tablet->axes);
-	tablet_smoothen_axes(tablet, &axes);
 
 	/* The delta relies on the last *smooth* point, so we do it last */
 	axes.delta = tablet_tool_process_delta(tablet, tool, device, &axes, time);
--- a/src/filter-tablet.c
+++ b/src/filter-tablet.c
@@ -97,6 +97,7 @@ tablet_accelerator_filter_flat(struct motion_filter *filter,
 			       const struct device_float_coords *units,
 			       void *data, uint64_t time)
 {
+	return *(struct normalized_coords *)units;
 	struct tablet_accelerator_flat *accel_filter =
 		(struct tablet_accelerator_flat *)filter;
 	struct libinput_tablet_tool *tool = (struct libinput_tablet_tool*)data;