tracker: CategoryContainer should be abstract

diff --git a/src/plugins/tracker/rygel-tracker-category-container.vala b/src/plugins/tracker/rygel-tracker-category-container.vala
index 1be01b7..42ca518 100644 (file)
--- a/src/plugins/tracker/rygel-tracker-category-container.vala
+++ b/src/plugins/tracker/rygel-tracker-category-container.vala
@@ -26,7 +26,7 @@ using Gee;
 /**
  * Container listing content hierarchy for a specific category.
  */
-public class Rygel.Tracker.CategoryContainer : Rygel.SimpleContainer {
+public abstract class Rygel.Tracker.CategoryContainer : Rygel.SimpleContainer {
     public ItemFactory item_factory;
 
     public CategoryContainer (string         id,