hg: openjfx/8/graphics/rt: Fix for RT-27114: J2D failure when region caching is enabled.

[hang.vo at oracle.com]

Changeset: 298084c407a0
Author:    Richard Bair <richard.bair at oracle.com>
Date:      2012-12-19 19:30 -0800
URL:       http://hg.openjdk.java.net/openjfx/8/graphics/rt/rev/298084c407a0

Fix for RT-27114: J2D failure when region caching is enabled.

! javafx-sg-prism/src/com/sun/javafx/sg/prism/RegionImageCache.java
! javafx-sg-prism/test/com/sun/javafx/sg/prism/TestGraphics.java