Add NULL checks to crypto free functions.
Add NULL checks to crypto free functions.


git-svn-id: b1dee0d48e635e16c3b356ce77271b225d4db9f7@380 7dcaeef0-15fb-0310-b436-a5af3365683c

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