kex: Don't compare an array to null.
kex: Don't compare an array to null.

Found by Coverity.

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