RFR: 8314265: Fix -Wconversion warnings in miscellaneous runtime code [v8]

[Coleen Phillimore]

On Thu, 17 Aug 2023 12:37:03 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Fix MaxElementPrintSize and casts. Also fixed miscellaneous -Wconversion warnings in runtime code.  This is the last one I'm going to do for runtime for a while.
>> Tested with tier1-4.
>
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   David's and Christian's review comments.

Thanks David, Thomas, Christian and Dean for the reviews.

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PR Comment: https://git.openjdk.org/jdk/pull/15233#issuecomment-1683820346