RFR: JDK-8298147: Clang warns about pointless comparisons

[Thomas Stuefe]

On Wed, 7 Dec 2022 06:25:53 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Trivial fix for clang warnings. GET_CONTAINER_INFO_CPTR creates local buffers of the given size; comparing them with NULL will always yield the same result.
>
> These changes seem fine, but doesn't this then have a flow-on effect as these methods can themselves no longer return NULL?

Thanks for the review, @dholmes-ora

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PR: https://git.openjdk.org/jdk/pull/11544