kex: Fix a double free.
kex: Fix a double free.

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