hg: openjfx/8u-dev/rt: RT-37395: TreeTableView's selectedItems reports changes that include null items when when a TreeItem is collapsed.

[hang.vo at oracle.com]

Changeset: 784974feb001
Author:    jgiles
Date:      2014-06-06 12:40 +1200
URL:       http://hg.openjdk.java.net/openjfx/8u-dev/rt/rev/784974feb001

RT-37395: TreeTableView's selectedItems reports changes that include null items when when a TreeItem is collapsed.

! modules/controls/src/main/java/javafx/scene/control/MultipleSelectionModelBase.java
! modules/controls/src/main/java/javafx/scene/control/TreeTableView.java
! modules/controls/src/test/java/javafx/scene/control/TreeTableViewTest.java
! modules/controls/src/test/java/javafx/scene/control/TreeViewTest.java