RFR: 8191333: Zero variant broken after 8189941

[John Paul Adrian Glaubitz]

Hi!

Please review this change [1] which fixes Zero which got broken
after 8189941 [2].

Thanks to Robbin Ehn for the quick help with this!

Adrian

> [1] http://cr.openjdk.java.net/~glaubitz/8191333/webrev.00/
> [2] https://bugs.openjdk.java.net/browse/JDK-8191333

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 .''`.  John Paul Adrian Glaubitz
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`. `'   Freie Universitaet Berlin - glaubitz at physik.fu-berlin.de
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