Actually it was caused by some dummy code meant to shut gcc up for
an unused argument!
void ssl_sock_infocbk(const SSL *ssl, int where, int ret)
{
struct connection *conn = (struct connection *)SSL_get_app_data(ssl);
- (void)ret; /* shut gcc stupid warning */
BIO *write_bio;
+ (void)ret; /* shut gcc stupid warning */
if (where & SSL_CB_HANDSHAKE_START) {
/* Disable renegotiation (CVE-2009-3555) */