Fix poll sturct, ISO C doesn't allow unnamed unions.
Fix poll sturct, ISO C doesn't allow unnamed unions.

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