hg: openjfx/10-dev/rt: 8184270: NullPointerException when using Combobox in combination with accessibility app

[ajit.ghaisas at oracle.com]

Changeset: b29e458bb99c
Author:    pkbalakr
Date:      2017-11-17 10:48 +0530
URL:       http://hg.openjdk.java.net/openjfx/10-dev/rt/rev/b29e458bb99c

8184270: NullPointerException when using Combobox in combination with accessibility app
Reviewed-by: aghaisas, kcr

! modules/javafx.controls/src/main/java/javafx/scene/control/skin/ComboBoxListViewSkin.java