hg: openjfx/9-dev/rt: 8172719: Build failure on Windows platform after fix for JDK-8172372

[kevin.rushforth at oracle.com]

Changeset: 0bb20d324310
Author:    kcr
Date:      2017-01-12 07:59 -0800
URL:       http://hg.openjdk.java.net/openjfx/9-dev/rt/rev/0bb20d324310

8172719: Build failure on Windows platform after fix for JDK-8172372
Reviewed-by: vadim

! modules/javafx.graphics/src/main/native-prism-es2/GLContext.c