[issue30708] Ensure that the result of PyUnicode_AsWideCharString() doesn't contain null characters if size is not returned

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Could anyone please make a review of this PR? Especially the documentation part. This PR is a part of a set of PRs that fix potential vulnerabilities (issue13617, issue30730, and yet few issues planned).

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30708>
_______________________________________