7003434:...

7003434: test/closed/java/awt/FullScreen/DisplayChangeVITest/DisplayChangeVITest.java fails with ClassCastExc
Reviewed-by: jgodinez, prr

src/windows/classes/sun/java2d/opengl/WGLVolatileSurfaceManager.java

@@ -133,7 +133,9 @@ public class WGLVolatileSurfaceManager
 
     @Override
     protected boolean isConfigValid(GraphicsConfiguration gc) {
-        return ((gc == null) || (gc == vImg.getGraphicsConfig()));
+        return ((gc == null) ||
+                ((gc instanceof WGLGraphicsConfig) &&
+                 (gc == vImg.getGraphicsConfig())));
     }
 
     @Override