[glib-networking/mcatanzaro/tls1.2] Ensure gnutls_certificate_allocate_credentials() is successful

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 407c18c536eb92d67d451e9b31a4346d354c6f8c
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sun Aug 18 17:37:40 2019 -0500

    Ensure gnutls_certificate_allocate_credentials() is successful
    
    This should never happen, and it does never happen in my extensive
    testing. But for robustness, we really should check to be sure it's not
    happening.

 tls/gnutls/gtlsconnection-gnutls.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/tls/gnutls/gtlsconnection-gnutls.c b/tls/gnutls/gtlsconnection-gnutls.c
index 4e883a7..c68fa0a 100644
--- a/tls/gnutls/gtlsconnection-gnutls.c
+++ b/tls/gnutls/gtlsconnection-gnutls.c
@@ -89,9 +89,11 @@ static void
 g_tls_connection_gnutls_init (GTlsConnectionGnutls *gnutls)
 {
   GTlsConnectionGnutlsPrivate *priv = g_tls_connection_gnutls_get_instance_private (gnutls);
-  gint unique_id;
+  int unique_id;
+  int ret;
 
-  gnutls_certificate_allocate_credentials (&priv->creds);
+  ret = gnutls_certificate_allocate_credentials (&priv->creds);
+  g_assert (ret == GNUTLS_E_SUCCESS);
 
   unique_id = g_atomic_int_add (&unique_interaction_id, 1);
   priv->interaction_id = g_strdup_printf ("gtls:%d", unique_id);