[gnome-tetravex/arnaudb/wip/gtk4: 18/32] Use show_title_buttons.

[Arnaud B. <arnaudb src gnome org>]

commit 0486cd11c7653dae7b7c331b7d3e5a5c1413467f
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Fri Feb 21 04:25:25 2020 +0100

    Use show_title_buttons.

 src/gnome-tetravex.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/gnome-tetravex.vala b/src/gnome-tetravex.vala
index 20cded9..48e8fc7 100644
--- a/src/gnome-tetravex.vala
+++ b/src/gnome-tetravex.vala
@@ -321,7 +321,7 @@ private class Tetravex : Gtk.Application
 
         HeaderBar headerbar = new HeaderBar ();
         headerbar.title = PROGRAM_NAME;
-        headerbar.show_close_button = true;
+        headerbar.show_title_buttons = true;
         headerbar.show ();
         window.set_titlebar (headerbar);