From 79ad0c90d0ffea8266894e6ec6715ef99036b7bc Mon Sep 17 00:00:00 2001
From: Alexandra Berke <berke.alexandra@gmail.com>
Date: Thu, 28 May 2015 13:57:03 -0400
Subject: [PATCH] Without this change you get the following error: comparison
 of unsigned expression < 0 is alway due to the Wtautological-compare compile
 flag

---
 c_src/exmpp_tls_openssl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/c_src/exmpp_tls_openssl.c b/c_src/exmpp_tls_openssl.c
index 92fbe5f..770a726 100644
--- a/c_src/exmpp_tls_openssl.c
+++ b/c_src/exmpp_tls_openssl.c
@@ -441,7 +441,8 @@ exmpp_tls_openssl_control(ErlDrvData drv_data, unsigned int command,
 	case COMMAND_GET_PEER_CERTIFICATE:
 		/* Get the peer certificate. */
 		cert = SSL_get_peer_certificate(edd->ssl);
-		if (cert == NULL || (rlen = i2d_X509(cert, NULL)) < 0) {
+		int rlen = i2d_X509(cert, NULL);
+		if (cert == NULL || rlen < 0) {
 			to_send = exmpp_new_xbuf();
 			if (to_send == NULL)
 				return (-1);