Fix up partially reverted change. (#572)
Fix up partially reverted change. (#572)

* Fix up partiallty reverted change.

Introduced by #565.

* Review fix.

google/certificate-transparency-go,RJPercival/certificate-transparency-go,daviddrysdale/certificate-transparency-go,RJPercival/certificate-transparency-go,google/certificate-transparency-go,daviddrysdale/certificate-transparency-go,RJPercival/certificate-transparency-go,daviddrysdale/certificate-transparency-go,google/certificate-transparency-go