Fixes the bug that `BitSet.equals(null)` throws NPE. A single reviewer should be sufficient.
------------- Commit messages: - fix equals(null) - failing test Changes: https://git.openjdk.org/jfx/pull/1766/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1766&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8353845 Stats: 16 lines in 3 files changed: 9 ins; 2 del; 5 mod Patch: https://git.openjdk.org/jfx/pull/1766.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/1766/head:pull/1766 PR: https://git.openjdk.org/jfx/pull/1766
