Fix compilation warning.
Fix compilation warning.

jawj/passenger,gravitystorm/passenger,phusion/passenger,clemensg/passenger,pkmiec/passenger,gravitystorm/passenger,jawj/passenger,bf4/passenger,antek-drzewiecki/passenger,cgvarela/passenger,pkmiec/passenger,cgvarela/passenger,clemensg/passenger,openSUSE/passenger,pkmiec/passenger,kewaunited/passenger,gravitystorm/passenger,openSUSE/passenger,jawj/passenger,antek-drzewiecki/passenger,kewaunited/passenger,phusion/passenger,kewaunited/passenger,antek-drzewiecki/passenger,jawj/passenger,antek-drzewiecki/passenger,jawj/passenger,clemensg/passenger,openSUSE/passenger,cgvarela/passenger,pkmiec/passenger,erikogan/passenger,phusion/passenger,erikogan/passenger,phusion/passenger,jawj/passenger,phusion/passenger,gravitystorm/passenger,kewaunited/passenger,bf4/passenger,erikogan/passenger,cgvarela/passenger,erikogan/passenger,cgvarela/passenger,gravitystorm/passenger,clemensg/passenger,pkmiec/passenger,fabiokung/passenger-debian,pkmiec/passenger,cgvarela/passenger,kewaunited/passenger,fabiokung/passenger-debian,bf4/passenger,antek-drzewiecki/passenger,bf4/passenger,cgvarela/passenger,bf4/passenger,erikogan/passenger,pkmiec/passenger,clemensg/passenger,phusion/passenger,openSUSE/passenger,kewaunited/passenger,kewaunited/passenger,phusion/passenger,antek-drzewiecki/passenger,clemensg/passenger,jawj/passenger,fabiokung/passenger-debian,cgvarela/passenger,gravitystorm/passenger,fabiokung/passenger-debian,openSUSE/passenger,phusion/passenger,bf4/passenger,bf4/passenger,antek-drzewiecki/passenger,antek-drzewiecki/passenger,kewaunited/passenger,openSUSE/passenger,clemensg/passenger,clemensg/passenger,fabiokung/passenger-debian,erikogan/passenger,fabiokung/passenger-debian