hg: openjfx/9-dev/rt: 8178155: Revert fix for JDK-8176844 in JDK 9

[semyon.sadetsky at oracle.com]

Changeset: dfcdf7a0e995
Author:    ssadetsky
Date:      2017-04-06 08:00 -0700
URL:       http://hg.openjdk.java.net/openjfx/9-dev/rt/rev/dfcdf7a0e995

8178155: Revert fix for JDK-8176844 in JDK 9
Reviewed-by: kcr

! modules/javafx.graphics/src/main/native-glass/gtk/glass_general.cpp