hg: jdk8/awt/jdk: 8004298: NPE in WindowsTreeUI.ensureRowsAreVisible

[alexandr.scherbatiy at oracle.com]

Changeset: f55d869052dd
Author:    alexsch
Date:      2013-01-21 17:55 +0400
URL:       http://hg.openjdk.java.net/jdk8/awt/jdk/rev/f55d869052dd

8004298: NPE in WindowsTreeUI.ensureRowsAreVisible
Reviewed-by: serb

! src/share/classes/com/sun/java/swing/plaf/windows/WindowsTreeUI.java
+ test/javax/swing/JTree/8004298/bug8004298.java