[gtk+] Add a missing include

[Matthias Clasen <matthiasc src gnome org>]

commit 36ca3fd5e9106a241e833942f96549af21554580
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Nov 27 18:44:31 2009 -0500

    Add a missing include
    
    memset() is used in gdk/x11/gdkinput-xfree.c but string.h is not included.
    Patch by Vincent Untz, bug 597026.

 gdk/x11/gdkinput-xfree.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/gdk/x11/gdkinput-xfree.c b/gdk/x11/gdkinput-xfree.c
index d0f217c..bf63959 100644
--- a/gdk/x11/gdkinput-xfree.c
+++ b/gdk/x11/gdkinput-xfree.c
@@ -18,6 +18,7 @@
  */
 
 #include "config.h"
+#include <string.h>
 #include "gdkinputprivate.h"
 #include "gdkdisplay-x11.h"
 #include "gdkalias.h"
@@ -372,7 +373,7 @@ _gdk_input_grab_pointer (GdkWindow      *window,
 	      ((gdkdev->button_count != 0) || need_ungrab))
 	    {
 	      XUngrabDevice (display_impl->xdisplay, gdkdev->xdevice, time);
-	      memset(gdkdev->button_state, 0, sizeof (gdkdev->button_state));
+	      memset (gdkdev->button_state, 0, sizeof (gdkdev->button_state));
 	      gdkdev->button_count = 0;
 	    }