poll: Fixed type of the fd variables and use SSH_INVALID_SOCKET.
poll: Fixed type of the fd variables and use SSH_INVALID_SOCKET.

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