auth: Fix a possible double free.
auth: Fix a possible double free.

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