Change "readObject() as Type" to "Type(readObject())" for vilya for better error checking and faster failure

git-svn-id: svn+ssh://src.earth.threerings.net/vilya/trunk@758 c613c5cb-e716-0410-b11b-feb51c14d237

src/as/com/threerings/whirled/data/SceneModel.as

@@ -102,7 +102,7 @@ public class SceneModel extends SimpleStreamableObject
         sceneId = ins.readInt();
         name = (ins.readField(String) as String);
         version = ins.readInt();
-        auxModels = (ins.readObject() as TypedArray);
+        auxModels = TypedArray(ins.readObject());
     }
 
     // documentation inherited from interface Streamable