[gtk+] testcenterbox: Properly quit on window close

[Timm Bäder <baedert src gnome org>]

commit 98281bc60acbe9fb92b66af8d51577f138be7fac
Author: Timm Bäder <mail baedert org>
Date:   Fri Sep 1 19:35:30 2017 +0200

    testcenterbox: Properly quit on window close

 tests/testcenterbox.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/tests/testcenterbox.c b/tests/testcenterbox.c
index 151d6bf..9d05d18 100644
--- a/tests/testcenterbox.c
+++ b/tests/testcenterbox.c
@@ -28,6 +28,8 @@ main (int argc, char *argv[])
   gtk_label_set_ellipsize (GTK_LABEL (child), PANGO_ELLIPSIZE_END);
   gtk_center_box_set_end_widget (GTK_CENTER_BOX (box), child);
 
+  g_signal_connect (window, "delete-event", G_CALLBACK (gtk_main_quit), NULL);
+
   gtk_widget_show (window);
 
   gtk_main ();