RFR: JDK-8300241: Replace NULL with nullptr in share/classfile/ [v2]

[Coleen Phillimore]

On Tue, 24 Jan 2023 22:47:24 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Johan Sjölen has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains three commits:
>> 
>>  - Merge remote-tracking branch 'origin/master' into JDK-8300241
>>  - Manual fixes
>>  -  Replace NULL with nullptr in share/classfile/
>
> I didn't see any other places that needed changing.

> Hi @coleenp , I didn't click your suggested changes as they seem to be creating single commits for each change!
I think they have to be all or nothing to work, but it might be a good way to review these.

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PR: https://git.openjdk.org/jdk/pull/12030