[issue46085] OrderedDict iterator allocates di_result unnecessarily

[Inada Naoki]

Inada Naoki <songofacandy at gmail.com> added the comment:

Nice catch.

>     if ((kind & _odict_ITER_KEYS) && (kind &_odict_ITER_VALUES))

You can reduce one branch by

```
#define _odict_ITER_ITEMS (_odict_ITER_KEYS|_odict_ITER_VALUES)
...
     if (kind & _odict_ITER_ITEMS == _odict_ITER_ITEMS)
```

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nosy: +methane

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue46085>
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