Expose isResolved so things changing the block can decide if they should add or remove objects from it

git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@494 ed5b42cb-e716-0410-a449-f6a68f950b19

src/java/com/threerings/miso/client/SceneBlock.java

@@ -199,7 +199,7 @@ public class SceneBlock
     /**
      * Returns true if this block has been resolved, false if not.
      */
-    protected synchronized boolean isResolved ()
+    public synchronized boolean isResolved ()
     {
         return _sbounds != null;
     }