[rygel] server: Fix compile issue introduced with 6cccd5

[Jens Georg <jensgeorg src gnome org>]

commit f9965e681ca62a4f150017681f8851e1986eb19b
Author: Jens Georg <jensg openismus com>
Date:   Thu Oct 31 01:48:12 2013 +0100

    server: Fix compile issue introduced with 6cccd5

 src/librygel-server/rygel-media-container.vala |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/librygel-server/rygel-media-container.vala b/src/librygel-server/rygel-media-container.vala
index c6e0b13..2c290a7 100644
--- a/src/librygel-server/rygel-media-container.vala
+++ b/src/librygel-server/rygel-media-container.vala
@@ -267,9 +267,9 @@ public abstract class Rygel.MediaContainer : MediaObject {
                                 sub_tree_update);
     }
 
-    internal override DIDLLiteObject? serialize (Serializer serializer,
-                                                 HTTPServer http_server)
-                                                 throws Error {
+    public override DIDLLiteObject? serialize (Serializer serializer,
+                                               HTTPServer http_server)
+                                               throws Error {
         var didl_container = serializer.add_container ();
         if (didl_container == null) {
             return null;