src/cap-ng.c: fix build without threads (#13)
src/cap-ng.c: fix build without threads (#13)

Put pthread_atfork under #ifdef HAVE_PTHREAD_H block

Signed-off-by: Fabrice Fontaine <7d88633730b8b85c1516e612893df72eae9cd341@gmail.com>
stevegrubb/libcap-ng,stevegrubb/libcap-ng,stevegrubb/libcap-ng