BUG: 32 bit build does not work with -Werror

[jonashaag]

Pandas version checks

• I have checked that this issue has not already been reported.
• I have confirmed this bug exists on the latest version of pandas.
• I have confirmed this bug exists on the main branch of pandas.

Reproducible Example

PANDAS_CI=1 python setup.py build_ext

Issue Description

pandas/_libs/hashtable.c: In function ‘__pyx_f_6pandas_5_libs_9hashtable_value_count_complex128’:
    pandas/_libs/hashtable.c:70107:33: error: comparison of integer expressions of different signedness: ‘Py_ssize_t’ {aka ‘int’} and ‘khuint_t’ {aka ‘unsigned int’} [-Werror=sign-compare]
    70107 |   for (__pyx_t_3 = 0; __pyx_t_3 < __pyx_t_16; __pyx_t_3+=1) {
          |                                 ^

Issue seems to be that this range has a signed int counter that is compare to an unsigned int limit:

pandas/pandas/_libs/hashtable_func_helper.pxi.in

Line 89 in 48d5159

for i in range(table.size):

pandas/pandas/_libs/hashtable_func_helper.pxi.in

Line 39 in 48d5159

Py_ssize_t i = 0

[DriesSchaumont]

For reference: support for Linux 32bit will be dropped somewhere in the future.
xref #44453

[jonashaag]

@DriesSchaumont It is still tested for in CI though https://github.com/pandas-dev/pandas/blob/main/azure-pipelines.yml#L35

[DriesSchaumont]

Woops. My bad.

[jonashaag]

But we aren't testing Windows 32 bit although that other thread says it's supported 🤔

[fangchenli]

But we aren't testing Windows 32 bit although that other thread says it's supported 🤔

Overall our support for 32 bit is very flimsy. We skip/xfail some tests to make the CI green...