The recent change in [JDK-8301996](https://bugs.openjdk.org/browse/JDK-8301996) added more -Wconversion warnings that are addressed in this patch. The aforementioned change has overlooked inconsistencies with the types used by `ResolvedFieldEntry` and the method `fill_in()`. Verified with tier 1-4 tests.
------------- Commit messages: - 8313554: Fix -Wconversion warnings for ResolvedFieldEntry Changes: https://git.openjdk.org/jdk/pull/15126/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15126&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8313554 Stats: 9 lines in 3 files changed: 2 ins; 0 del; 7 mod Patch: https://git.openjdk.org/jdk/pull/15126.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15126/head:pull/15126 PR: https://git.openjdk.org/jdk/pull/15126
