[libnma] src/nma-mobile-wizard.c: Make it not fail on non-X11 platforms

[Thomas Haller <thaller src gnome org>]

commit 19178e0b3a7b44c03240a2e827961251c20942e7
Author: Javier Jardón <jjardon gnome org>
Date:   Sun Nov 24 00:27:43 2019 +0900

    src/nma-mobile-wizard.c: Make it not fail on non-X11 platforms
    
    Tested on a wayland-only system
    
    https://gitlab.gnome.org/GNOME/libnma/merge_requests/6

 src/nma-mobile-wizard.c | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/src/nma-mobile-wizard.c b/src/nma-mobile-wizard.c
index de30525b..b2ed0589 100644
--- a/src/nma-mobile-wizard.c
+++ b/src/nma-mobile-wizard.c
@@ -12,11 +12,13 @@
 
 #include <stdlib.h>
 
+#ifdef GDK_WINDOWING_X11
 #if GTK_CHECK_VERSION(3,90,0)
 #include <gdk/x11/gdkx.h>
 #else
 #include <gdk/gdkx.h>
 #endif
+#endif
 
 #include <NetworkManager.h>
 #include <nm-setting-gsm.h>
@@ -1459,6 +1461,7 @@ nma_mobile_wizard_init (NMAMobileWizard *self)
        gtk_widget_init_template (GTK_WIDGET (self));
        gtk_widget_realize (GTK_WIDGET (self));
 
+#ifdef GDK_WINDOWING_X11
        if (GDK_IS_X11_DISPLAY (gtk_widget_get_display (GTK_WIDGET (self)))) {
 #if GTK_CHECK_VERSION(3,90,0)
                GdkSurface *surface = gtk_widget_get_surface (GTK_WIDGET (self));
@@ -1468,6 +1471,7 @@ nma_mobile_wizard_init (NMAMobileWizard *self)
                gdk_window_set_skip_taskbar_hint (gdk_window, TRUE);
 #endif
        }
+#endif
 }
 
 /**