Fix up the way we create our display to play nicely with the JmeCanvasApp.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3821 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/jme/JmeCanvasApp.java

@@ -92,9 +92,15 @@ public class JmeCanvasApp extends JmeApp
         return EventQueue.isDispatchThread();
     }
 
-    /**
-     * Initializes our user interface bits.
-     */
+    // documentation inherited
+    protected DisplaySystem createDisplay ()
+    {
+        // we've already created our display earlier so just return it
+        _api = "LWJGL";
+        return _display;
+    }
+
+    // documentation inherited
     protected void initInterface ()
     {
         _iface = new Node("Interface");