CVE-2012-4559: Ensure that we don't free req twice.
CVE-2012-4559: Ensure that we don't free req twice.

mwgoldsmith/libssh,mwgoldsmith/libssh,mwgoldsmith/ssh,mwgoldsmith/libssh,mwgoldsmith/ssh,mwgoldsmith/libssh,mwgoldsmith/ssh,mwgoldsmith/ssh