[gnome-settings-daemon] wacom: Use new supports_xtest() function

[Bastien Nocera <hadess src gnome org>]

commit 7212c41481b7e3797b56fae9a141a5948caf9f8a
Author: Bastien Nocera <hadess hadess net>
Date:   Sat Jan 19 01:44:40 2013 +0100

    wacom: Use new supports_xtest() function

 plugins/wacom/gsd-wacom-manager.c |    4 +---
 1 files changed, 1 insertions(+), 3 deletions(-)
---
diff --git a/plugins/wacom/gsd-wacom-manager.c b/plugins/wacom/gsd-wacom-manager.c
index b26bd41..3d16a49 100644
--- a/plugins/wacom/gsd-wacom-manager.c
+++ b/plugins/wacom/gsd-wacom-manager.c
@@ -1441,8 +1441,6 @@ gboolean
 gsd_wacom_manager_start (GsdWacomManager *manager,
                          GError         **error)
 {
-	int a, b, c, d;
-
         gnome_settings_profile_start (NULL);
 
         if (supports_xinput2_devices (&manager->priv->opcode) == FALSE) {
@@ -1450,7 +1448,7 @@ gsd_wacom_manager_start (GsdWacomManager *manager,
                 return TRUE;
         }
 
-        if (!XTestQueryExtension (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()), &a, &b, &c, &d)) {
+        if (supports_xtest () == FALSE) {
                 g_debug ("No XTest extension support, disabling plugin");
                 return TRUE;
         }