[mutter] display: Add forgotten meta_display_cancel_touch

[Jasper St. Pierre <jstpierre src gnome org>]

commit 6c22759d298db4e88f8fbba79d802b7153b20961
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue Jul 22 02:07:19 2014 +0200

    display: Add forgotten meta_display_cancel_touch

 src/core/display.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/src/core/display.c b/src/core/display.c
index 6804032..d9550ad 100644
--- a/src/core/display.c
+++ b/src/core/display.c
@@ -462,6 +462,18 @@ meta_set_gnome_wm_keybindings (const char *wm_keybindings)
 }
 
 static void
+meta_display_cancel_touch (MetaDisplay *display)
+{
+  MetaWaylandCompositor *compositor;
+
+  if (!meta_is_wayland_compositor ())
+    return;
+
+  compositor = meta_wayland_compositor_get_default ();
+  meta_wayland_touch_cancel (&compositor->seat->touch);
+}
+
+static void
 gesture_tracker_state_changed (MetaGestureTracker   *tracker,
                                ClutterEventSequence *sequence,
                                MetaSequenceState     state,