pki: Fix a memory leak.
pki: Fix a memory leak.

CID #1132819

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