hg: openjfx/8/graphics/rt: Fix for RT-26241: made Screen class more robust

[hang.vo at oracle.com]

Changeset: 591592a4ae64
Author:    Lubomir Nerad <lubomir.nerad at oracle.com>
Date:      2012-11-20 16:20 +0100
URL:       http://hg.openjdk.java.net/openjfx/8/graphics/rt/rev/591592a4ae64

Fix for RT-26241: made Screen class more robust

! javafx-ui-common/src/javafx/stage/Screen.java
+ javafx-ui-common/test/unit/javafx/stage/ScreenTest.java