* es_out: msg_Err -> msg_Warn for Program empty. But I still need to

fix it... (it should be annoying only with TS, you may have dead program
entry).

src/input/es_out.c

@@ -756,8 +756,8 @@ static void EsOutDel( es_out_t *out, es_out_id_t *es )
     es->p_pgrm->i_es--;
     if( es->p_pgrm->i_es == 0 )
     {
-        msg_Err( p_sys->p_input, "Program doesn't contain anymore ES, "
-                 "TODO cleaning ?" );
+        msg_Warn( p_sys->p_input, "Program doesn't contain anymore ES, "
+                  "TODO cleaning ?" );
     }
 
     if( p_sys->p_es_audio == es ) p_sys->p_es_audio = NULL;