mod_sofia: sofia_handle_sip_i_state needs a valid tech_pvt

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@14535 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/endpoints/mod_sofia/sofia.c

@@ -3252,7 +3252,7 @@ static void sofia_handle_sip_i_state(switch_core_session_t *session, int status,
 	int offer_recv = 0, answer_recv = 0, offer_sent = 0, answer_sent = 0;
 	int ss_state = nua_callstate_init;
 	switch_channel_t *channel = NULL;
-	private_object_t *tech_pvt = NULL;
+	private_object_t *tech_pvt = session ? switch_core_session_get_private(session) : NULL;
 	const char *replaces_str = NULL;
 	const char *uuid;
 	switch_core_session_t *other_session = NULL;