Finds zlib in a debug only build (windows)
Finds zlib in a debug only build (windows)

Signed-off-by: Christophe Baribaud <e4da7f71e6a9fdbb1f06a9e3c99e0eb6627ff57f@gmail.com>
Signed-off-by: Andreas Schneider <5be00ddc76278cf6077f5047ca3384a88460c671@cryptomilk.org>

jt1/honeypot-libssh,Distrotech/libssh,elastichosts/libssh,pouete/libssh,kedazo/libssh,mwgoldsmith/ssh,sebadoom/libssh,robxu9/libssh,DouglasHeriot/libssh,sebadoom/libssh,nviennot/libssh,bigcat26/libssh-mod,robxu9/libssh,bigcat26/libssh-mod,pouete/libssh,Distrotech/libssh,jt1/honeypot-libssh,DouglasHeriot/libssh,mwgoldsmith/ssh,jt1/honeypot-libssh,bigcat26/libssh-mod,nviennot/libssh,robxu9/libssh,taikoo/libssh,sebadoom/libssh,kedazo/libssh,mwgoldsmith/libssh,Distrotech/libssh,DouglasHeriot/libssh,taikoo/libssh,robxu9/libssh,Distrotech/libssh,wangshawn/libssh,nviennot/libssh,sebadoom/libssh,mwgoldsmith/libssh,kedazo/libssh,taikoo/libssh,elastichosts/libssh,mwgoldsmith/libssh,wangshawn/libssh,elastichosts/libssh,pouete/libssh,jt1/honeypot-libssh,DouglasHeriot/libssh,nviennot/libssh,bigcat26/libssh-mod,mwgoldsmith/ssh,mwgoldsmith/ssh,wangshawn/libssh,mwgoldsmith/libssh,wangshawn/libssh,taikoo/libssh,kedazo/libssh,pouete/libssh