tweaks

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@2328 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/endpoints/mod_dingaling/mod_dingaling.c

@@ -202,7 +202,9 @@ static void terminate_session(switch_core_session_t **session, switch_call_cause
 				channel_on_hangup(*session);
 			}
 
+			if (tech_pvt->dlsession) {
 				ldl_session_set_private(tech_pvt->dlsession, NULL);
+			}
 			switch_core_session_destroy(session);
 		}
 	}