[jdk16u] RFR: 8260401: StackOverflowError on open WindowsPreferences

[Evan Whelan]

Hi, 

Please review this backport which prevents StackOverflowError occurring on Windows.

This occurs when users have incorrect registry access.

Regards,
Evan

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Commit messages:
 - 8260401: StackOverflowError on open WindowsPreferences

Changes: https://git.openjdk.java.net/jdk16u/pull/78/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk16u&pr=78&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8260401
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk16u/pull/78.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk16u pull/78/head:pull/78

PR: https://git.openjdk.java.net/jdk16u/pull/78