try to actually do something on no media re-invites.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@7446 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/endpoints/mod_sofia/mod_sofia.c

@@ -755,6 +755,7 @@ static switch_status_t sofia_receive_message(switch_core_session_t *session, swi
 		{
 			switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Sending media re-direct:\n%s\n", msg->string_arg);
 			tech_pvt->local_sdp_str = switch_core_session_strdup(session, msg->string_arg);
+			switch_set_flag_locked(tech_pvt, TFLAG_SENT_UPDATE);
 			sofia_glue_do_invite(session);
 		}
 		break;