append returns '() when given no args
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			@ -501,6 +501,10 @@ pic_pair_append(pic_state *pic)
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  pic_get_args(pic, "*", &argc, &args);
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  if (argc == 0) {
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    return pic_nil_value();
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  }
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  list = args[--argc];
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  while (argc-- > 0) {
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