[gtk+] wayland: Fix build

[Carlos Garnacho <carlosg src gnome org>]

commit 4a9f17c690c450f4a937badf3cb631743e663eed
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Jul 22 20:58:55 2016 +0200

    wayland: Fix build
    
    Missing include pointing to tablet-unstable-v1-client-protocol.h,
    pays me for not testing on a clean checkout.

 gdk/wayland/gdkdisplay-wayland.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gdk/wayland/gdkdisplay-wayland.h b/gdk/wayland/gdkdisplay-wayland.h
index 03cf1d4..4da0291 100644
--- a/gdk/wayland/gdkdisplay-wayland.h
+++ b/gdk/wayland/gdkdisplay-wayland.h
@@ -27,7 +27,7 @@
 #include <wayland-client.h>
 #include <wayland-cursor.h>
 #include <wayland-egl.h>
-#include <gdk/wayland/tablet-unstable-v1-client-protocol.h>
+#include <gdk/wayland/tablet-unstable-v2-client-protocol.h>
 #include <gdk/wayland/gtk-shell-client-protocol.h>
 #include <gdk/wayland/xdg-shell-unstable-v5-client-protocol.h>