hg: openjfx/jfx-dev/rt: 8226274: NPE in WinWindow.notifyMoving when Stage with no Scene is shown on 2nd monitor

[kevin.rushforth at oracle.com]

Changeset: 0dd97a3b7cb6
Author:    kcr
Date:      2019-06-21 09:27 -0700
URL:       http://hg.openjdk.java.net/openjfx/jfx-dev/rt/rev/0dd97a3b7cb6

8226274: NPE in WinWindow.notifyMoving when Stage with no Scene is shown on 2nd monitor
Reviewed-by: arapte, jhendrikx

! modules/javafx.graphics/src/main/java/com/sun/glass/ui/win/WinWindow.java
+ tests/system/src/test/java/test/javafx/stage/MultipleScreensTest.java