[gnome-desktop/jjardon/gdkx_guards] gnome-idle-monitor.c: Add guards to X-only code

[Javier Jardón Cabezas <jjardon src gnome org>]

commit 1760848c96f5e376828a4533a691e6cbca9c13e9
Author: Javier Jardón <jjardon gnome org>
Date:   Sun Nov 24 19:47:16 2019 +0900

    gnome-idle-monitor.c: Add guards to X-only code

 libgnome-desktop/gnome-idle-monitor.c | 8 ++++++++
 1 file changed, 8 insertions(+)
---
diff --git a/libgnome-desktop/gnome-idle-monitor.c b/libgnome-desktop/gnome-idle-monitor.c
index d7583a2b..51e3ce79 100644
--- a/libgnome-desktop/gnome-idle-monitor.c
+++ b/libgnome-desktop/gnome-idle-monitor.c
@@ -25,7 +25,9 @@
 
 #include <glib.h>
 #include <glib/gi18n-lib.h>
+#ifdef GDK_WINDOWING_X11
 #include <gdk/gdkx.h>
+#endif
 #include <gdk/gdk.h>
 #if defined(GDK_WINDOWING_WAYLAND)
 #include <gdk/gdkwayland.h>
@@ -208,8 +210,14 @@ gnome_idle_monitor_set_property (GObject      *object,
 
                g_free (monitor->priv->path);
                if (monitor->priv->device) {
+#ifdef GDK_WINDOWING_X11
+               if (GDK_IS_X11_DISPLAY (gdk_display_get_default ())){
                        monitor->priv->path = g_strdup_printf ("/org/gnome/Mutter/IdleMonitor/Device%d",
                                                               gdk_x11_device_get_id (monitor->priv->device));
+#else
+                       monitor->priv->path = g_strdup_printf ("/org/gnome/Mutter/IdleMonitor/Device%s",
+                                                              gdk_device_get_product_id 
(monitor->priv->device));
+#endif
                } else {
                        monitor->priv->path = g_strdup ("/org/gnome/Mutter/IdleMonitor/Core");
                }