RFR: 8315362: NMT: summary diff reports threads count incorrectly [v3]

[Evgeny Ignatenko]

> 8315362: NMT: summary diff reports threads count incorrectly

Evgeny Ignatenko has updated the pull request incrementally with one additional commit since the last revision:

  Change thread_count var type to size_t

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Changes:
  - all: https://git.openjdk.org/jdk/pull/15490/files
  - new: https://git.openjdk.org/jdk/pull/15490/files/b912bb66..fbc736b0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15490&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15490&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/15490.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15490/head:pull/15490

PR: https://git.openjdk.org/jdk/pull/15490