options: Fix a memory leak if we can't add an idenity.
options: Fix a memory leak if we can't add an idenity.

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