hg: openjfx/8u-dev/rt: RT-39809: Combobox: IOOBE when selecting null item

[jonathan.giles at oracle.com]

Changeset: d64258ade175
Author:    jgiles
Date:      2015-01-15 13:46 +1300
URL:       http://hg.openjdk.java.net/openjfx/8u-dev/rt/rev/d64258ade175

RT-39809: Combobox: IOOBE when selecting null item

! modules/controls/src/main/java/javafx/scene/control/MultipleSelectionModelBase.java
! modules/controls/src/test/java/javafx/scene/control/ComboBoxTest.java