For models with locked transforms (i.e., props), don't bother trying to

keep the world bound up-to-date; it won't change, and updateWorldVectors 
has no effect.


git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@56 ed5b42cb-e716-0410-a449-f6a68f950b19

src/java/com/threerings/jme/model/Model.java

@@ -843,6 +843,9 @@ public class Model extends ModelNode
         // update controllers and children with accumulated time
         _accum += time;
         if (_outside) {
+            if ((lockedMode & LOCKED_TRANSFORMS) != 0) {
+                return; // world bound will not changed
+            }
             if (!wasOutside) {
                 storeWorldBound();
             }