[11] Review request: JDK-8196617: FX print tests fail with NPE in some environments

[Laurent Bourgès]

Kevin,

Please review this webrev that fixes the NPE in getMediaName():
JBS: https://bugs.openjdk.java.net/browse/JDK-8196617
webrev: http://cr.openjdk.java.net/~lbourges/fx/fx-8196617.0/

It was tested OK on the appveyor CI that failed before the patch.

Thanks,
Laurent