hg: openjfx/10-dev/rt: 8189677: RadioMenuItem fires extra NULL value in property

[ajit.ghaisas at oracle.com]

Changeset: c11670e22243
Author:    aghaisas
Date:      2017-11-03 10:24 +0530
URL:       http://hg.openjdk.java.net/openjfx/10-dev/rt/rev/c11670e22243

8189677: RadioMenuItem fires extra NULL value in property
Reviewed-by: kcr

! modules/javafx.controls/src/main/java/javafx/scene/control/RadioMenuItem.java
! modules/javafx.controls/src/test/java/test/javafx/scene/control/RadioMenuItemTest.java