[telepathy-sofiasip/master] Prevent an assertion when no transport is selected

[Mikhail Zabaluev]

---
 src/sip-connection-helpers.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/src/sip-connection-helpers.c b/src/sip-connection-helpers.c
index c95ad60..02717f7 100644
--- a/src/sip-connection-helpers.c
+++ b/src/sip-connection-helpers.c
@@ -810,7 +810,8 @@ tpsip_handle_normalize (TpHandleRepoIface *repo,
     {
       /* Set the scheme to SIP or SIPS accordingly to the connection's
        * transport preference */
-      if (g_ascii_strcasecmp (priv->transport, "tls") == 0)
+      if (priv->transport != NULL
+          && g_ascii_strcasecmp (priv->transport, "tls") == 0)
         {
           url->url_type = url_sips;
           url->url_scheme = "sips";
-- 
1.5.6.5