hg: openjfx/8/graphics/rt: RT-28963: Mac: DragEvent.getScreenY() returns incorrect value on drag drop

[hang.vo at oracle.com]

Changeset: 7fc4181950e2
Author:    Petr Pchelko <petr.pchelko at oracle.com>
Date:      2013-06-06 11:34 +0400
URL:       http://hg.openjdk.java.net/openjfx/8/graphics/rt/rev/7fc4181950e2

RT-28963: Mac: DragEvent.getScreenY() returns incorrect value on drag drop
Reviewed-by: anthony

! glass/glass-lib-macosx/src/GlassViewDelegate.m