It was reported that LZO has security issues in LMS-2014-06-16-1:
Oberhumer LZO (CVE-2014-4607): http://seclists.org/oss-sec/2014/q2/665

This was also reported by Alex Xu as
https://github.com/LibVNC/libvncserver/issues/9.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>