[jdk17u-dev] RFR: 8332720: ubsan: instanceKlass.cpp:3550:76: runtime error: member call on null pointer of type 'struct Array'

[Matthias Baesken]

Backport of 8332720, NULL was still in 17u-dev , that's why not clean

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Commit messages:
 - Backport e19a421c30534566ba0dea0fa84f812ebeecfc87

Changes: https://git.openjdk.org/jdk17u-dev/pull/2847/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2847&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8332720
  Stats: 7 lines in 1 file changed: 2 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2847.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2847/head:pull/2847

PR: https://git.openjdk.org/jdk17u-dev/pull/2847