RFR: 8331633: Use MIN2 in bound_minus_alignment

[Albert Mingkun Yang]

Trivial use of `MIN2`.

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Commit messages:
 - trivial

Changes: https://git.openjdk.org/jdk/pull/19076/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19076&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8331633
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/19076.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19076/head:pull/19076

PR: https://git.openjdk.org/jdk/pull/19076