forgotten return value; refs #33

src/openssl.hxx

@@ -852,6 +852,7 @@ namespace openssl {
         // _x509 = d2i_X509(0, &d2, len);
         // OPENSSL_free(d);
         if (!_x509) throw x509_copy_failed();
+        return *this;
       }
       //! Get a copy of the OpenSSL low level certificate
       /*! @note you are responsible to free the certificate */