RFR: 8345505: Fix -Wzero-as-null-pointer-constant warnings in zero code

[David Holmes]

On Fri, 13 Dec 2024 03:35:46 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

> Please review this trivial change to remove some -Wzero-as-null-pointer-constant
> warnings in zero code.  Just replaced two literal 0's with nullptr.
> 
> Testing: mach5 tier1, GHA sanity tests

Looks good and trivial.

Thanks

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Marked as reviewed by dholmes (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/22728#pullrequestreview-2501274483