RFR: 8191663: Zero variant broken after 8189170 and 8189871

[John Paul Adrian Glaubitz]

Hello!

Please review this change which fixes the Zero build which got broken after
the changes introduced by 8189170 and 8189871. Webrev in [1].

Thanks,

Adrian

> [1] http://cr.openjdk.java.net/~glaubitz/8191663/webrev.00/

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 .''`.  John Paul Adrian Glaubitz
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