Add error checking to all gzip functions.
Add error checking to all gzip functions.


git-svn-id: b1dee0d48e635e16c3b356ce77271b225d4db9f7@420 7dcaeef0-15fb-0310-b436-a5af3365683c

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