RFR: 8357576: FieldInfo::_index is not initialized by the constructor [v2]

[Matias Saavedra Silva]

> FieldInfo::_index is not initialized in either of the FieldInfo constructors so this patch adds initialization to both constructors. Verified with tier 1-5 tests

Matias Saavedra Silva has updated the pull request incrementally with one additional commit since the last revision:

  Updated copyright

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Changes:
  - all: https://git.openjdk.org/jdk/pull/25554/files
  - new: https://git.openjdk.org/jdk/pull/25554/files/e059e29a..c40a1222

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25554&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25554&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/25554.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25554/head:pull/25554

PR: https://git.openjdk.org/jdk/pull/25554