ivi-shell: SEGV occurs when multi touch happens in transition

of application launching. This is because cancel callback is mistakenly
set to weston_touch_grab_interface. To fix this issue, add a
callback, touch_move_workspace_grab_frame and set it to the
weston_touch_grab_interface like desktop-shell.

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>

ivi-shell/hmi-controller.c

@@ -1388,6 +1388,11 @@ pointer_move_workspace_grab_cancel(struct weston_pointer_grab *grab)
 	free(grab);
 }
 
+static void
+touch_move_workspace_grab_frame(struct weston_touch_grab *grab)
+{
+}
+
 static void
 touch_move_workspace_grab_cancel(struct weston_touch_grab *grab)
 {
@@ -1408,6 +1413,7 @@ static const struct weston_touch_grab_interface touch_move_grab_workspace_interf
 	touch_nope_grab_down,
 	touch_move_workspace_grab_up,
 	touch_move_grab_motion,
+	touch_move_workspace_grab_frame,
 	touch_move_workspace_grab_cancel
 };