RFR: 8374168: Resolve disabled warnings in JDWP agent [v6]

[Alex Menkov]

> The fix resolves disabled warnings in debugger agent

Alex Menkov has updated the pull request incrementally with one additional commit since the last revision:

  use unsigned int to workaround MS warning 5287

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Changes:
  - all: https://git.openjdk.org/jdk/pull/28937/files
  - new: https://git.openjdk.org/jdk/pull/28937/files/64ca8bbb..30fbc50a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28937&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28937&range=04-05

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/28937.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28937/head:pull/28937

PR: https://git.openjdk.org/jdk/pull/28937