Fix another warning spotted on FreeBSD
Fix another warning spotted on FreeBSD

franciscovg/Varnish-Cache,franciscovg/Varnish-Cache,feld/Varnish-Cache,franciscovg/Varnish-Cache,feld/Varnish-Cache,gquintard/Varnish-Cache,franciscovg/Varnish-Cache,gquintard/Varnish-Cache,feld/Varnish-Cache,varnish/Varnish-Cache,varnish/Varnish-Cache,franciscovg/Varnish-Cache,gquintard/Varnish-Cache,varnish/Varnish-Cache,feld/Varnish-Cache,varnish/Varnish-Cache,feld/Varnish-Cache,gquintard/Varnish-Cache,varnish/Varnish-Cache