Fix build warnings in client sample.
Fix build warnings in client sample.


git-svn-id: b1dee0d48e635e16c3b356ce77271b225d4db9f7@232 7dcaeef0-15fb-0310-b436-a5af3365683c

robxu9/libssh,mwgoldsmith/libssh,substack/libssh,bigcat26/libssh-mod,taikoo/libssh,pouete/libssh,sebadoom/libssh,jahrome/libssh,DouglasHeriot/libssh,nviennot/libssh,jahrome/libssh,substack/libssh,elastichosts/libssh,Distrotech/libssh,elastichosts/libssh,mwgoldsmith/ssh,rofl0r/libssh,miloj/libssh-v0.5,jahrome/libssh,jt1/honeypot-libssh,mwgoldsmith/libssh,sebadoom/libssh,rofl0r/libssh,pouete/libssh,jahrome/libssh,DouglasHeriot/libssh,wangshawn/libssh,DouglasHeriot/libssh,pouete/libssh,bigcat26/libssh-mod,rofl0r/libssh,taikoo/libssh,bigcat26/libssh-mod,substack/libssh,taikoo/libssh,mwgoldsmith/ssh,rofl0r/libssh,miloj/libssh-v0.5,DouglasHeriot/libssh,wangshawn/libssh,taikoo/libssh,kedazo/libssh,jt1/honeypot-libssh,mwgoldsmith/ssh,nviennot/libssh,wangshawn/libssh,robxu9/libssh,nviennot/libssh,kedazo/libssh,kedazo/libssh,sebadoom/libssh,bigcat26/libssh-mod,nviennot/libssh,elastichosts/libssh,Distrotech/libssh,robxu9/libssh,sebadoom/libssh,jt1/honeypot-libssh,miloj/libssh-v0.5,pouete/libssh,jt1/honeypot-libssh,mwgoldsmith/libssh,Distrotech/libssh,Distrotech/libssh,kedazo/libssh,mwgoldsmith/ssh,mwgoldsmith/libssh,robxu9/libssh,wangshawn/libssh,miloj/libssh-v0.5,substack/libssh