Replace deprecated gdk_set_sm_client_id() invocation

gdk_set_sm_client_id() has been replaced by
gdk_x11_set_sm_client_id() [1] since GDK 2.24.

[1] http://developer.gnome.org/gdk/stable/gdk-General.html#gdk-set-sm-client-id

Signed-off-by: Raul Gutierrez Segales <rgs@collabora.co.uk>
[changed description]
Signed-off-by: Sascha Silbe <silbe@activitycentral.com>

src/sugar3/eggsmclient-xsmp.c

@@ -265,7 +265,7 @@ sm_client_xsmp_connect (gpointer user_data)
       free (client_id);
 
       gdk_threads_enter ();
-      gdk_set_sm_client_id (xsmp->client_id);
+      gdk_x11_set_sm_client_id (xsmp->client_id);
       gdk_threads_leave ();
 
       g_debug ("Got client ID \"%s\"", xsmp->client_id);