[gtk+] wayland: Disallow setting the cursor on the touch master pointer

[Carlos Garnacho <carlosg src gnome org>]

commit c405f810cdc8f1de7d60dde4f5e31ee81a88a382
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Nov 19 20:06:07 2015 +0100

    wayland: Disallow setting the cursor on the touch master pointer
    
    That "pointer" is not backed by anything in the windowing system, ignore
    cursor updates there.

 gdk/wayland/gdkdevice-wayland.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gdk/wayland/gdkdevice-wayland.c b/gdk/wayland/gdkdevice-wayland.c
index eefd38c..58f5b9e 100644
--- a/gdk/wayland/gdkdevice-wayland.c
+++ b/gdk/wayland/gdkdevice-wayland.c
@@ -283,6 +283,9 @@ gdk_wayland_device_set_window_cursor (GdkDevice *device,
 {
   GdkWaylandDeviceData *wd = GDK_WAYLAND_DEVICE (device)->device;
 
+  if (device == wd->touch_master)
+    return;
+
   /* Setting the cursor to NULL means that we should use
    * the default cursor
    */