[quadrapassel] Preview: declare set_visible as a new method

[Mario Wenzel <mariowenzel src gnome org>]

commit e3020c0c443d9223ac1c99eecf263ac6645d9e55
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Wed Jan 15 19:14:49 2014 -0600

    Preview: declare set_visible as a new method
    
    https://bugzilla.gnome.org/show_bug.cgi?id=722307

 src/preview.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/preview.vala b/src/preview.vala
index f75c2a7..9dd2cbe 100644
--- a/src/preview.vala
+++ b/src/preview.vala
@@ -128,7 +128,7 @@ public class Preview : GtkClutter.Embed
         piece.restore_easing_state ();
     }
 
-    public void set_visible(bool visible)
+    public new void set_visible (bool visible)
     {
         base.set_visible (visible);
         if (parent_frame != null)