[gnome-settings-daemon] device-manager: fix typo

[Carlos Garnacho <carlosg src gnome org>]

commit 316564a917be6765a02b76802c876efcac31ae9c
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue Jan 20 18:25:03 2015 +0100

    device-manager: fix typo
    
    g_return_val_if_fail is checking the wrong variable here...

 plugins/common/gsd-device-manager-x11.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/plugins/common/gsd-device-manager-x11.c b/plugins/common/gsd-device-manager-x11.c
index afd3747..89397bd 100644
--- a/plugins/common/gsd-device-manager-x11.c
+++ b/plugins/common/gsd-device-manager-x11.c
@@ -250,7 +250,7 @@ gsd_x11_device_manager_lookup_gdk_device (GsdX11DeviceManager *manager,
        const gchar *device_node;
 
        g_return_val_if_fail (GSD_IS_X11_DEVICE_MANAGER (manager), NULL);
-       g_return_val_if_fail (GDK_IS_DEVICE (manager), NULL);
+       g_return_val_if_fail (GDK_IS_DEVICE (gdk_device), NULL);
 
        device_node = g_hash_table_lookup (manager->gdk_devices, gdk_device);