[gtk+] wayland: Fix compilation warning for destroy function implementation

[Rob Bradford <rbradford src gnome org>]

commit 0aa210866cbc4e9f17b3a86038cade53494a39c2
Author: Rob Bradford <rob linux intel com>
Date:   Thu Jan 12 13:38:12 2012 +0000

    wayland: Fix compilation warning for destroy function implementation

 gdk/wayland/gdkdevice-wayland.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gdk/wayland/gdkdevice-wayland.c b/gdk/wayland/gdkdevice-wayland.c
index a390667..bb48f5d 100644
--- a/gdk/wayland/gdkdevice-wayland.c
+++ b/gdk/wayland/gdkdevice-wayland.c
@@ -863,7 +863,7 @@ _gdk_wayland_device_manager_add_device (GdkDeviceManager *device_manager,
 }
 
 static void
-free_device (void *data, void *user_data)
+free_device (gpointer data)
 {
   g_object_unref (data);
 }