[libgames-support] Avoid warning about copying delegates

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 433d543c9b6d24ffc7f367324d1e668bae5ad1b4
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sat Sep 19 18:02:41 2015 -0500

    Avoid warning about copying delegates
    
    
http://stackoverflow.com/questions/16693847/how-to-get-rid-of-the-vala-compilation-warning-copying-delegates-is-discouraged

 games/scores/context.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/games/scores/context.vala b/games/scores/context.vala
index a09a37b..7bf1fae 100644
--- a/games/scores/context.vala
+++ b/games/scores/context.vala
@@ -61,7 +61,7 @@ public class Context : Object
     public Context (string app_name, string dialog_label, Gtk.Window? game_window, CategoryRequestFunc 
category_request, Style style)
     {
         this.game_window = game_window;
-        this.category_request = category_request;
+        this.category_request = (key) => { return category_request (key); };
         this.style = style;
 
         if (style == Style.PLAIN_DESCENDING || style == Style.TIME_DESCENDING)