RFR: 8335370: Fix -Wzero-as-null-pointer-constant warning in jvmti_common.hpp

[Serguei Spitsyn]

On Sun, 30 Jun 2024 22:15:34 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

> Please review this trivial change to the print_method function in
> test/lib/jdk/test/lib/jvmti/jvmti_common.hpp.  It was passing 0 as the FILE*
> argument to fflush, triggering -Wzero-as-null-pointer-constant if that warning
> is enabled.  The change is to replace that 0 with nullptr.
> 
> This removes about 10% of the -Wzero-as-null-pointer-constant warnings when
> building with that option.
> 
> Testing: mach5 tier1

Marked as reviewed by sspitsyn (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/19962#pullrequestreview-2154808436