libinput: Forward frame events to clients

Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=77353

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
diff --git a/desktop-shell/shell.c b/desktop-shell/shell.c
index 0732789..bc4a258 100644
--- a/desktop-shell/shell.c
+++ b/desktop-shell/shell.c
@@ -1403,6 +1403,11 @@
 }
 
 static void
+touch_move_grab_frame(struct weston_touch_grab *grab)
+{
+}
+
+static void
 touch_move_grab_cancel(struct weston_touch_grab *grab)
 {
 	struct weston_touch_move_grab *move =
@@ -1417,6 +1422,7 @@
 	touch_move_grab_down,
 	touch_move_grab_up,
 	touch_move_grab_motion,
+	touch_move_grab_frame,
 	touch_move_grab_cancel,
 };