bpo-45020: Fix strict-prototypes warning (GH-29755)

[tiran]

https://bugs.python.org/issue45020

[gvanrossum]

I'd forgotten about that. Thanks!

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x SLES 3.x has failed when building commit 5c4b19e.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/540/builds/1439) and take a look at the build logs.
4. Check if the failure is related to this commit (5c4b19e) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/540/builds/1439

Summary of the results of the build (if available):

== Tests result: ENV CHANGED ==

412 tests OK.

10 slowest tests:

• test_concurrent_futures: 3 min 8 sec
• test_tools: 2 min 44 sec
• test_multiprocessing_spawn: 2 min 34 sec
• test_peg_generator: 1 min 59 sec
• test_multiprocessing_forkserver: 1 min 24 sec
• test_multiprocessing_fork: 1 min 11 sec
• test_nntplib: 1 min 6 sec
• test_unparse: 59.8 sec
• test_tokenize: 53.4 sec
• test_signal: 50.5 sec

1 test altered the execution environment:
test_ftplib

14 tests skipped:
test_devpoll test_epoll test_ioctl test_kqueue test_msilib
test_nis test_startfile test_tix test_tk test_ttk_guionly
test_winconsoleio test_winreg test_winsound test_zipfile64

Total duration: 6 min 1 sec

Click to see traceback logs

Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/multiprocessing/resource_tracker.py", line 209, in main
    cache[rtype].remove(name)
    ^^^^^^^^^^^^^^^^^^^^^^^^^
KeyError: '/psm_07b6354f'


Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/multiprocessing/resource_tracker.py", line 209, in main
    cache[rtype].remove(name)
    ^^^^^^^^^^^^^^^^^^^^^^^^^
KeyError: '/psm_5d47d9f7'


Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/threading.py", line 1031, in _bootstrap_inner
    self.run()
    ^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/test/test_ftplib.py", line 294, in run
    asyncore.loop(timeout=0.1, count=1)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/test/support/_asyncore.py", line 208, in loop
    poll_fun(timeout, map)
    ^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/test/support/_asyncore.py", line 151, in poll
    read(obj)
    ^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/test/support/_asyncore.py", line 88, in read
    obj.handle_error()
    ^^^^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/test/test_ftplib.py", line 136, in handle_error
    raise Exception
    ^^^^^^^^^^^^^^^
Exception


Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/test/support/_asyncore.py", line 84, in read
    obj.handle_read_event()
    ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/test/support/_asyncore.py", line 421, in handle_read_event
    self.handle_read()
    ^^^^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/test/support/_asynchat.py", line 171, in handle_read
    self.found_terminator()
    ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/test/test_ftplib.py", line 131, in found_terminator
    method(arg)
    ^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/test/test_ftplib.py", line 156, in cmd_pasv
    conn, addr = sock.accept()
                 ^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/socket.py", line 293, in accept
    fd, addr = self._accept()
               ^^^^^^^^^^^^^^
TimeoutError: timed out


Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/multiprocessing/resource_tracker.py", line 209, in main
    cache[rtype].remove(name)
    ^^^^^^^^^^^^^^^^^^^^^^^^^
KeyError: '/psm_98aaabcc'

[ericsnowcurrently]

Thanks, @tiran!