git: openjdk/jdk-sandbox: parttimenerd_jfr_cpu_time_sampler: Fix bugs

[duke]

Changeset: c785be89
Author:    Johannes Bechberger <johannes.bechberger at sap.com>
Date:      2024-06-08 17:53:16 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/c785be8927f506c38b9a1c3685dc2a9a2def25e9

Fix bugs

! src/hotspot/share/jfr/periodic/sampling/jfrCPUTimeThreadSampler.cpp
! src/hotspot/share/jfr/recorder/stacktrace/jfrStackTrace.hpp