Add more error checks to RSA_do_sign().
Add more error checks to RSA_do_sign().


git-svn-id: b1dee0d48e635e16c3b356ce77271b225d4db9f7@539 7dcaeef0-15fb-0310-b436-a5af3365683c

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