Expose the DObject here. Then the client code needn't keep both a subscriber and an object lying around.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@6693 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/main/as/com/threerings/presents/util/SafeSubscriber.as

@@ -71,6 +71,14 @@ public class SafeSubscriber implements Subscriber
         return _active;
     }
 
+    /**
+     * Gets the object we are subscribed to, or null if the subscription is not yet complete.
+     */
+    public function getObject () :DObject
+    {
+        return _object;
+    }
+
     /**
      * Initiates the subscription process.
      */