[gtk+] wayland: Only update the window title if it actually updated

[Jonas Ådahl <jadahl src gnome org>]

commit d2a80cd2353c95a9657387af37256ca8f1ad81f3
Author: Jonas Ådahl <jadahl gmail com>
Date:   Fri Jul 1 16:51:32 2016 +0800

    wayland: Only update the window title if it actually updated
    
    This makes the protocol log less spammy.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=769937

 gdk/wayland/gdkwindow-wayland.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gdk/wayland/gdkwindow-wayland.c b/gdk/wayland/gdkwindow-wayland.c
index b058612..f1f0098 100644
--- a/gdk/wayland/gdkwindow-wayland.c
+++ b/gdk/wayland/gdkwindow-wayland.c
@@ -2343,6 +2343,9 @@ gdk_wayland_window_set_title (GdkWindow   *window,
 
   impl = GDK_WINDOW_IMPL_WAYLAND (window->impl);
 
+  if (g_strcmp0 (impl->title, title) == 0)
+    return;
+
   g_free (impl->title);
 
   g_utf8_validate (title, MAX_WL_BUFFER_SIZE, &end);