hg: openjfx/8/controls/rt: fix RT-29729 Exception on stage security and menu is not opened.

[hang.vo at oracle.com]

Changeset: b3c20547e8aa
Author:    psomashe
Date:      2013-08-12 14:35 -0700
URL:       http://hg.openjdk.java.net/openjfx/8/controls/rt/rev/b3c20547e8aa

fix RT-29729 Exception on stage security and menu is not opened.

! modules/controls/src/main/java/com/sun/javafx/scene/control/skin/ContextMenuContent.java
! modules/controls/src/main/java/com/sun/javafx/scene/control/skin/MenuBarSkin.java
! modules/controls/src/main/java/com/sun/javafx/scene/control/skin/MenuButtonSkinBase.java