RFR: JDK-8318671: Potential uninitialized uintx value after JDK-8317683 [v3]

[Thomas Stuefe]

> When using 'MemStat' CompileCommand, we accidentally register the command if an invalid suboption had been specified. Fixed, added regression test (verified).

Thomas Stuefe has updated the pull request incrementally with two additional commits since the last revision:

 - remove tab
 - Make patch more palatable

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/16335/files
  - new: https://git.openjdk.org/jdk/pull/16335/files/3e563292..1564cf45

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16335&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16335&range=01-02

  Stats: 40 lines in 2 files changed: 11 ins; 13 del; 16 mod
  Patch: https://git.openjdk.org/jdk/pull/16335.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16335/head:pull/16335

PR: https://git.openjdk.org/jdk/pull/16335