[gtk+] Include config.h first

[Matthias Clasen <matthiasc src gnome org>]

commit beae42c49b7316edb2456a128a405bce3c01302e
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Aug 21 13:19:26 2014 -0400

    Include config.h first
    
    Otherwise, we miss the _GNU_SOURCE #define that configure
    puts there.

 gdk/wayland/gdkdevice-wayland.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gdk/wayland/gdkdevice-wayland.c b/gdk/wayland/gdkdevice-wayland.c
index efe413a..26d81b4 100644
--- a/gdk/wayland/gdkdevice-wayland.c
+++ b/gdk/wayland/gdkdevice-wayland.c
@@ -15,12 +15,12 @@
  * License along with this library. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include "config.h"
+
 #include <unistd.h>
 #include <fcntl.h>
 #include <errno.h>
 
-#include "config.h"
-
 #include <string.h>
 #include <gdk/gdkwindow.h>
 #include <gdk/gdktypes.h>