RFR: 8336081: Fix -Wzero-as-null-pointer-constant warnings in JVMTypedFlagLimit ctors

[Kim Barrett]

On Thu, 11 Jul 2024 03:00:26 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Please review this change to member initializers in the JVMTypedFlagLimit<T>
>> class template.  It has two members of type T, which were being initialized
>> with a literal value of 0, triggering -Wzero-as-null-pointer-constant when T
>> is a pointer type and that warning is enabled.
>> 
>> We instead value initialize these members. For scalar types this performs
>> zero-initialization, without triggering -Wzero-as-null-pointer-constant if
>> it's a pointer type.
>> 
>> Testing: mach5 tier1
>
> Okay.

Thanks for reviews @dholmes-ora and @TheShermanTanker

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PR Comment: https://git.openjdk.org/jdk/pull/20112#issuecomment-2225187611