[jdk21u-dev] RFR: 8330615: avoid signed integer overflows in zip_util.c readCen / hashN

[Matthias Baesken]

8330615: avoid signed integer overflows in zip_util.c readCen / hashN

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Commit messages:
 - Backport 5af6b45eefd227e3e046ca22a404ae8a23174160

Changes: https://git.openjdk.org/jdk21u-dev/pull/555/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=555&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8330615
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/555.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/555/head:pull/555

PR: https://git.openjdk.org/jdk21u-dev/pull/555