var->short_name_cnt = MAX (idx * 2, 1);
var->short_names = xnrealloc (var->short_names, var->short_name_cnt,
sizeof *var->short_names);
var->short_name_cnt = MAX (idx * 2, 1);
var->short_names = xnrealloc (var->short_names, var->short_name_cnt,
sizeof *var->short_names);