qidarg_converter_data Values Not Properly Initialized

[ericsnowcurrently]

Bug report

Bug description:

In #124548 (comment), @ZeroIntensity noted that the various locals of type qidarg_converter_data in _interpqueuesmodule.c are not statically initialized. Whether or not they are initialized to zeros by default is "undefined behavior, ergo depends on the compiler. This could be a problem since the corresponding arg converter func branches on whether or the "label" field is NULL. This may (or may not) be related to the buildbot failures noted in that other issue.

Fixing this will be fairly trivial.

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

• gh-125667: Statically Initialize the Arg Converter Data Values in _interpqueuesmodule.c #125668
• [3.13] gh-125667: Statically Initialize the Arg Converter Data Values in _interpqueuesmodule.c (gh-125668) #125670