[quadrapassel/gnome-3-8] Hiding preview embed when preview is unavailable or disabled

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 49f252f2c49b0717a177c245fbe9683bf89490c2
Author: Mario Wenzel <maweki gmail com>
Date:   Mon May 20 16:24:09 2013 +0200

    Hiding preview embed when preview is unavailable or disabled
    
    If preview of next block is unavailable or disabled, the embed
     is hidden. Also the gtk layout was changed slightly to allow
    for the scoreboard to be displayed alone.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=700720
    (cherry picked from commit d9cb3197470089cac14be053a080f935d406a6df)

 src/preview.vala      |    5 +++++
 src/quadrapassel.vala |    2 +-
 2 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/src/preview.vala b/src/preview.vala
index 5f91d00..af92679 100644
--- a/src/preview.vala
+++ b/src/preview.vala
@@ -77,7 +77,12 @@ public class Preview : GtkClutter.Embed
             piece.destroy ();
 
         if (game == null || game.next_shape == null || !enabled)
+        {
+            set_visible(false);
             return;
+        }
+
+        set_visible (true);
 
         piece = new Clutter.Group ();
         var stage = (Clutter.Stage) get_stage ();
diff --git a/src/quadrapassel.vala b/src/quadrapassel.vala
index 26efad9..696883f 100644
--- a/src/quadrapassel.vala
+++ b/src/quadrapassel.vala
@@ -159,7 +159,7 @@ public class Quadrapassel : Gtk.Application
         var vb2 = new Gtk.Box (Gtk.Orientation.VERTICAL, 0);
         vb2.set_border_width (10);
         vb2.show ();
-        hb.pack_end (vb2, false, false, 0);
+        hb.pack_end (vb2, true, false, 0);
 
         preview = new Preview ();
         preview.theme = settings.get_string ("theme");