dh: Don't leak 'f' on error.
dh: Don't leak 'f' on error.

Found by Coverity.

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