hg: openjfx/8/graphics/rt: RT-31398: Mac: Tooltips crash the JVM when hidden or closed

[hang.vo at oracle.com]

Changeset: e6c244b0362b
Author:    Petr Pchelko <petr.pchelko at oracle.com>
Date:      2013-07-25 16:19 +0400
URL:       http://hg.openjdk.java.net/openjfx/8/graphics/rt/rev/e6c244b0362b

RT-31398: Mac: Tooltips crash the JVM when hidden or closed
Reviewed-by: anthony, art

! modules/graphics/src/main/native-glass/mac/GlassWindow.m