Unbreak build when LOGGING option is disabled

PR: 198090
Reported by: Piotr Kubaj <pkubaj@riseup.net>
Reported by: Matthew D. Fuller <fullermd@over-yonder.net>
Reported by: rozhuk.im@gmail.com
Obtained from: https://github.com/mozilla/gecko-dev/commit/6af7f0e6
MFH: 2015Q1
X-MFH-With: r380090