RFR: 8304836: Make MALLOC_MIN4 macro more robust [v2]

[Brent Christian]

On Fri, 21 Apr 2023 16:22:02 GMT, Naoto Sato <naoto at openjdk.org> wrote:

>> The current macro assumes the argument is `jint` because all locations pass `jint`. However, this would not work if a wider type such as `jlong` is passed. Removing the `unsigned` cast and make the condition explicit would make the macro more robust.
>
> Naoto Sato has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update src/java.base/share/native/libjava/jni_util.c
>   
>   Co-authored-by: David Schlosnagle <schlosna at gmail.com>

Marked as reviewed by bchristi (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/13564#pullrequestreview-1396087410