gh-102509: Ignore acceptable access of an uninitialized value

[illia-v]

This is done to ignore an error on accessing an uninitialized integer without an adverse effect.
#102509 (comment)

• Issue: cpython3:fuzz_builtin_unicode: Use-of-uninitialized-value in maybe_small_long #102509

[erlend-aasland]

AFAICS, this is an alternative to #102510. Let's wait an see what the Marks decide over there first.

[arhadthedev]

Let's wait an see what the Marks decide over there first.

@mdickinson

[illia-v]

It will be nice to have the error fixed in the first beta of 3.12.

I've just checked that #101291 has not affected the use of the uninitialized value yet (see #102510 (comment) for previous expectations) and running CC=clang ./configure --with-memory-sanitizer && make -j12 still fails without the patch.

[mdickinson]

@arhadthedev

@mdickinson

I think this one's for @markshannon to decide; he has better awareness of the #102510 performance trade-offs than I do. (And it's "his" code, in some sense.)

[illia-v]

Closing this because the value was initialized explicitly in #102510 and #107464