[swell-foop] trivial: use HeaderBar.pack_start()

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 2c17030e8b908ea722a298d9157416107f3ef800
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sat Feb 8 18:11:28 2014 -0600

    trivial: use HeaderBar.pack_start()

 src/swell-foop.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/swell-foop.vala b/src/swell-foop.vala
index 30b0531..eaae034 100644
--- a/src/swell-foop.vala
+++ b/src/swell-foop.vala
@@ -102,7 +102,7 @@ public class SwellFoop : Gtk.Application
             new_game_button.valign = Gtk.Align.CENTER;
             new_game_button.action_name = "app.new-game";
             new_game_button.show ();
-            headerbar.add (new_game_button);
+            headerbar.pack_start (new_game_button);
         }
 
         /* show the current score */