More casts for size of address differences in same code space, checked_casts<> and type changes to fix -Wconversion warnings. See CR for details. Tested with tier1-4.
------------- Commit messages: - Fix -Wconversion warnings in runtime, oops and some code header files. Changes: https://git.openjdk.org/jdk/pull/14659/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14659&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8310906 Stats: 71 lines in 36 files changed: 0 ins; 0 del; 71 mod Patch: https://git.openjdk.org/jdk/pull/14659.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/14659/head:pull/14659 PR: https://git.openjdk.org/jdk/pull/14659
