Not to freak out if we have no scene.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@760 542714f4-19e9-0310-aa3c-eee0fc999fb1

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

@@ -1,5 +1,5 @@
 //
-// $Id: IsoSceneView.java,v 1.75 2001/11/29 23:35:37 mdb Exp $
+// $Id: IsoSceneView.java,v 1.76 2001/12/12 19:53:11 mdb Exp $
 
 package com.threerings.miso.scene;
 
@@ -568,6 +568,7 @@ public class IsoSceneView implements SceneView
         }
 
         // add any objects impacted by the dirty rectangle
+        if (_scene != null) {
             ObjectTileLayer tiles = _scene.getObjectLayer();
             Iterator iter = _objpolys.keys();
             while (iter.hasNext()) {
@@ -586,6 +587,7 @@ public class IsoSceneView implements SceneView
                 }
             }
         }
+    }
 
     // documentation inherited
     public Path getPath (MisoCharacterSprite sprite, int x, int y)