[gtk+] gdkgears: Add window content spacing back

[Timm Bäder <baedert src gnome org>]

commit 500d25e3c8be369b89c3e66d4e3a665ffd9f0810
Author: Timm Bäder <mail baedert org>
Date:   Thu Jul 20 12:41:12 2017 +0200

    gdkgears: Add window content spacing back
    
    This was lost when border-width was removed.

 tests/gdkgears.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/tests/gdkgears.c b/tests/gdkgears.c
index ab9ab33..94002d5 100644
--- a/tests/gdkgears.c
+++ b/tests/gdkgears.c
@@ -120,6 +120,7 @@ main (int argc, char *argv[])
   g_signal_connect (window, "destroy", G_CALLBACK (gtk_main_quit), NULL);
 
   overlay = gtk_overlay_new ();
+  g_object_set (overlay, "margin", 12, NULL);
   gtk_container_add (GTK_CONTAINER (window), overlay);
   gtk_widget_show (overlay);