Fixes bug #99
Fixes bug #99

returns error when no cryptographic context is available

bigcat26/libssh-mod,substack/libssh,rofl0r/libssh,mwgoldsmith/ssh,sebadoom/libssh,robxu9/libssh,Distrotech/libssh,jt1/honeypot-libssh,jahrome/libssh,rofl0r/libssh,mwgoldsmith/libssh,sebadoom/libssh,nviennot/libssh,mwgoldsmith/ssh,miloj/libssh-v0.5,pouete/libssh,pouete/libssh,jahrome/libssh,DouglasHeriot/libssh,nviennot/libssh,sebadoom/libssh,Distrotech/libssh,bigcat26/libssh-mod,DouglasHeriot/libssh,Distrotech/libssh,pouete/libssh,taikoo/libssh,jahrome/libssh,kedazo/libssh,jt1/honeypot-libssh,bigcat26/libssh-mod,mwgoldsmith/ssh,taikoo/libssh,kedazo/libssh,mwgoldsmith/libssh,miloj/libssh-v0.5,DouglasHeriot/libssh,bigcat26/libssh-mod,DouglasHeriot/libssh,pouete/libssh,robxu9/libssh,mwgoldsmith/libssh,mwgoldsmith/libssh,taikoo/libssh,elastichosts/libssh,nviennot/libssh,miloj/libssh-v0.5,jt1/honeypot-libssh,nviennot/libssh,wangshawn/libssh,wangshawn/libssh,miloj/libssh-v0.5,elastichosts/libssh,wangshawn/libssh,sebadoom/libssh,rofl0r/libssh,robxu9/libssh,jahrome/libssh,substack/libssh,Distrotech/libssh,wangshawn/libssh,mwgoldsmith/ssh,elastichosts/libssh,kedazo/libssh,robxu9/libssh,substack/libssh,rofl0r/libssh,jt1/honeypot-libssh,taikoo/libssh,substack/libssh,kedazo/libssh