hg: openjfx/2.2/controls/rt: RT-21089: Tab.setOnSelectionChanged fires twice even if nothing has changed.

[hang.vo at oracle.com]

Changeset: d60d057a30c9
Author:    Kinsley Wong
Date:      2012-05-29 11:40 -0700
URL:       http://hg.openjdk.java.net/openjfx/2.2/controls/rt/rev/d60d057a30c9

RT-21089: Tab.setOnSelectionChanged fires twice even if nothing has changed.

! javafx-ui-controls/src/javafx/scene/control/TabPane.java
! javafx-ui-controls/test/javafx/scene/control/TabPaneTest.java