[rygel] librygel-server: RygelTrackableContainer: Make methods protected.

[Murray Cumming <murrayc src gnome org>]

commit 46163c67cf8c81336cddbcd058f4dd9f2a51b07c
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Jan 17 12:53:52 2013 +0100

    librygel-server: RygelTrackableContainer: Make methods protected.
    
    Make add_child() and remove_child() protected instead of public,
    because even the overrides are only meant to be called from this
    class. This still generates public caller functions, unfortunately.

 src/librygel-server/rygel-trackable-container.vala |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/librygel-server/rygel-trackable-container.vala b/src/librygel-server/rygel-trackable-container.vala
index c4a5b64..f6307d4 100644
--- a/src/librygel-server/rygel-trackable-container.vala
+++ b/src/librygel-server/rygel-trackable-container.vala
@@ -50,7 +50,7 @@ public interface Rygel.TrackableContainer : Rygel.MediaContainer {
      * of the child item or child container.
      * See the remove_child() virtual function.
      */
-    public abstract async void add_child (MediaObject object);
+    protected abstract async void add_child (MediaObject object);
 
     /**
      * Add a child object, emitting the #RygelContainer::container_updated signal
@@ -77,7 +77,7 @@ public interface Rygel.TrackableContainer : Rygel.MediaContainer {
      * child item or child container from its set of objects.
      * See the add_child() virtual function.
      */
-    public abstract async void remove_child (MediaObject object);
+    protected abstract async void remove_child (MediaObject object);
 
     /**
      * Add a child object, emitting the #RygelContainer::container_updated signal