Fix NULL pointer checks in poll
Fix NULL pointer checks in poll

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