RFR: 8375737: Fix -Wzero-as-null-pointer-constant warnings in arm32 code

[Kim Barrett]

On Wed, 21 Jan 2026 05:11:53 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Please review this trivial change to arm32 code to avoid using literal zero as a null
>> pointer constant, instead using nullptr.
>> 
>> Testing: GHA build for arm32
>
> Good and trivial. Thanks

Thanks for reviewing @dholmes-ora

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PR Comment: https://git.openjdk.org/jdk/pull/29328#issuecomment-3776324337