hg: jdk7/swing/jdk: 6875153: JLayer.isOptimizedDrawingEnabled() throws NPE for null glass pane set

[alexander.potochkin at sun.com]

Changeset: 935814bd43a6
Author:    alexp
Date:      2009-09-01 18:51 +0400
URL:       http://hg.openjdk.java.net/jdk7/swing/jdk/rev/935814bd43a6

6875153: JLayer.isOptimizedDrawingEnabled() throws NPE for null glass pane set
Reviewed-by: rupashka

! src/share/classes/javax/swing/JLayer.java
! src/share/classes/javax/swing/plaf/LayerUI.java
+ test/javax/swing/JLayer/6875153/bug6875153.java