RFR: 8337782: Use THROW_NULL instead of THROW_0 in pointer contexts in prims code

[David Holmes]

On Sat, 3 Aug 2024 23:38:27 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

> Please review this trivial change that, in places in prims code where a
> pointer value is required, replaces uses of THROW_0 and THROW_MSG_0 with
> THROW_NULL and THROW_MSG_NULL respectively.
> 
> Testing: mach5 tier1

Okay. Thanks for cleaning up.

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Marked as reviewed by dholmes (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/20456#pullrequestreview-2220221708