hg: jdk7u/jdk7u-dev/jdk: 4909150: WindowsTreeUI can cause NullPointerException occasionally

[pavel.porvatov at oracle.com]

Changeset: 22f8570179e7
Author:    rupashka
Date:      2011-08-11 15:10 +0400
URL:       http://hg.openjdk.java.net/jdk7u/jdk7u-dev/jdk/rev/22f8570179e7

4909150: WindowsTreeUI can cause NullPointerException occasionally
Reviewed-by: alexp

! src/share/classes/com/sun/java/swing/plaf/windows/WindowsTreeUI.java