[jdk20u] RFR: 8304683: Memory leak in WB_IsMethodCompatible

[Tobias Hartmann]

Backport of [JDK-8304683](https://bugs.openjdk.java.net/browse/JDK-8304683). Applies cleanly. Approval is pending.

Thanks,
Tobias

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Commit messages:
 - 8304683: Memory leak in WB_IsMethodCompatible

Changes: https://git.openjdk.org/jdk20u/pull/37/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk20u&pr=37&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8304683
  Stats: 4 lines in 1 file changed: 0 ins; 1 del; 3 mod
  Patch: https://git.openjdk.org/jdk20u/pull/37.diff
  Fetch: git fetch https://git.openjdk.org/jdk20u.git pull/37/head:pull/37

PR: https://git.openjdk.org/jdk20u/pull/37