RFR: 8374444: Fix simple -Wzero-as-null-pointer-constant warnings [v2]

[Kim Barrett]

On Fri, 2 Jan 2026 07:31:39 GMT, Axel Boldt-Christmas <aboldtch at openjdk.org> wrote:

>> Kim Barrett has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   update copyrights
>
> lgtm. Trivial.

Thanks for review @xmas92

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PR Comment: https://git.openjdk.org/jdk/pull/29014#issuecomment-3704988320