BF: define expected Series of correct for arch (eg i386) int
 - [x] Closes  #14866
 - [x] tests added / passed
 - [x] passes ``git diff upstream/master | flake8 --diff``
 - [x] whatsnew entry (I believe it is nothing new ;) )

## [Current coverage](https://codecov.io/gh/pandas-dev/pandas/pull/15044?src=pr) is 84.75% (diff: 100%)
> Merging [#15044](https://codecov.io/gh/pandas-dev/pandas/pull/15044?src=pr) into [master](https://codecov.io/gh/pandas-dev/pandas/branch/master?src=pr) will decrease coverage by **<.01%**

```diff
@@             master     #15044   diff @@
==========================================
  Files           145        145          
  Lines         51146      51146          
  Methods           0          0          
  Messages          0          0          
  Branches          0          0          
==========================================
- Hits          43351      43350     -1   
- Misses         7795       7796     +1   
  Partials          0          0          
```

> Powered by [Codecov](https://codecov.io?src=pr). Last update [4de5cdc...11dccee](https://codecov.io/gh/pandas-dev/pandas/compare/4de5cdcb900ad365d7ed5352106a47d86156ea17...11dccee05d3bfee2fceae109940b9944525ab04f?src=pr) can you rebase / update this was closed by / superseded https://github.com/pandas-dev/pandas/pull/15766