[jdk21u-dev] RFR: 8333728: ubsan: shenandoahFreeSet.cpp:1347:24: runtime error: division by zero

[Matthias Baesken]

Backport of 8333728; loop coding is a little different / difs in the strides

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Commit messages:
 - Backport b5575942027281166676678e2081b024ec572644

Changes: https://git.openjdk.org/jdk21u-dev/pull/1030/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1030&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8333728
  Stats: 3 lines in 1 file changed: 0 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1030.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1030/head:pull/1030

PR: https://git.openjdk.org/jdk21u-dev/pull/1030