fix centos

Gabriele Contini

2019-12-01 bea0cec8b3f02a8e6317aba2ba5f40c16b927266

 src/library/os/openssl/signature_verifier.cpp

@@ -10,6 +10,10 @@
#include <stdlib.h>
#include <errno.h>

#ifdef _WIN32
#include <windows.h>
#endif

#include <public_key.h>

#include "../signature_verifier.h"