RFR: 8314932: G1: Fix -Wconversion warnings for simple cases inside g1 folder [v2]

Fri Aug 25 11:34:43 UTC 2023

> Simple dropping of conversions in miscellaneous places.
> 
> (I include all of them in one PR, because I think reviewing them requires local reasoning. There are other more complex conversions in g1 folder, which require their own PRs.)
> 
> Test: tier1-5

Albert Mingkun Yang has updated the pull request incrementally with one additional commit since the last revision:

  review

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Changes:
  - all: https://git.openjdk.org/jdk/pull/15413/files
  - new: https://git.openjdk.org/jdk/pull/15413/files/f5b7d510..7c42289e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15413&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15413&range=00-01

  Stats: 7 lines in 2 files changed: 0 ins; 7 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/15413.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15413/head:pull/15413

PR: https://git.openjdk.org/jdk/pull/15413