hg: openjfx/2.2/controls/rt: RT-22467: Moving a Button located in an AnchorPane to a Tab content gets you NPE

[hang.vo at oracle.com]

Changeset: 1a2a50109e8e
Author:    Kinsley Wong
Date:      2012-06-13 13:47 -0700
URL:       http://hg.openjdk.java.net/openjfx/2.2/controls/rt/rev/1a2a50109e8e

RT-22467: Moving a Button located in an AnchorPane to a Tab content gets you NPE

! javafx-ui-controls/src/com/sun/javafx/scene/control/skin/ButtonSkin.java