[gtk+/gtk-3-4] gtk-demo: fix the tool palette demo

[Matthias Clasen <matthiasc src gnome org>]

commit eb94f92f267f31c56fe840d0e0ad103c07bc09c1
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Apr 27 08:30:05 2012 -0400

    gtk-demo: fix the tool palette demo
    
    The palette was confined to its minimal size, when in horizontal mode.

 demos/gtk-demo/toolpalette.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/demos/gtk-demo/toolpalette.c b/demos/gtk-demo/toolpalette.c
index 1a45fc1..95ece8d 100644
--- a/demos/gtk-demo/toolpalette.c
+++ b/demos/gtk-demo/toolpalette.c
@@ -522,6 +522,7 @@ do_toolpalette (GtkWidget *do_widget)
                                       GTK_POLICY_NEVER,
                                       GTK_POLICY_AUTOMATIC);
       gtk_container_set_border_width (GTK_CONTAINER (palette_scroller), 6);
+      gtk_widget_set_hexpand (palette_scroller, TRUE);
 
       gtk_container_add (GTK_CONTAINER (palette_scroller), palette);
       gtk_container_add (GTK_CONTAINER (hbox), palette_scroller);