[librest] Do not set REST_SYSTEM_CA_FILE session attribute while building with --without-ca-certificates

[Ross Burton <rburton src gnome org>]

commit 72e19312518a80bdd8558e18edef95929a173553
Author: Javier HernÃndez <jhernandez emergya com>
Date:   Tue Aug 21 21:45:34 2012 +0200

    Do not set REST_SYSTEM_CA_FILE session attribute while building with --without-ca-certificates

 rest/rest-proxy.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/rest/rest-proxy.c b/rest/rest-proxy.c
index 78dc6b0..b96a0dc 100644
--- a/rest/rest-proxy.c
+++ b/rest/rest-proxy.c
@@ -391,6 +391,7 @@ rest_proxy_init (RestProxy *self)
   priv->session = soup_session_async_new ();
   priv->session_sync = soup_session_sync_new ();
 
+#if REST_SYSTEM_CA_FILE
   /* with ssl-strict (defaults TRUE) setting ssl-ca-file forces all
    * certificates to be trusted */
   g_object_set (priv->session,
@@ -399,6 +400,7 @@ rest_proxy_init (RestProxy *self)
   g_object_set (priv->session_sync,
                 "ssl-ca-file", REST_SYSTEM_CA_FILE,
                 NULL);
+#endif
 
 #if WITH_GNOME
   soup_session_add_feature_by_type (priv->session,