[jdk17u-dev] RFR: 8298147: Clang warns about pointless comparisons

[Goetz Lindenmaier]

I backport this for parity with 17.0.16-oracle.

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Commit messages:
 - Backport 1c2a093988c69ae0b2c0030835d11469fa9fb852

Changes: https://git.openjdk.org/jdk17u-dev/pull/3331/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3331&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8298147
  Stats: 27 lines in 2 files changed: 0 ins; 27 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3331.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3331/head:pull/3331

PR: https://git.openjdk.org/jdk17u-dev/pull/3331