Removes a few unnecessary dereferences of `sourceStage`. -------------
Commit messages: - Avoiding unnecessary pointer-chasing in sourceStageSpliterator() and avoiding a check-then-act in close() Changes: https://git.openjdk.org/jdk/pull/16241/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16241&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8318421 Stats: 10 lines in 1 file changed: 1 ins; 0 del; 9 mod Patch: https://git.openjdk.org/jdk/pull/16241.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/16241/head:pull/16241 PR: https://git.openjdk.org/jdk/pull/16241
