RFR: 8300800: UB: Shift exponent 32 is too large for 32-bit type 'int'

[Afshin Zafari]

The operand of shift which is a constant `0` changed to `unsigned long`.

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Commit messages:
 - 8300800: UB: Shift exponent 32 is too large for 32-bit type 'int'

Changes: https://git.openjdk.org/jdk/pull/20530/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20530&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8300800
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/20530.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20530/head:pull/20530

PR: https://git.openjdk.org/jdk/pull/20530