Test simulates a single mouse-released event. Fix simply guards against the null case.
------------- Commits: - 923a63b2: 8237372: NullPointerException in TabPaneSkin.stopDrag Changes: https://git.openjdk.java.net/jfx/pull/89/files Webrev: https://webrevs.openjdk.java.net/jfx/89/webrev.00 Issue: https://bugs.openjdk.java.net/browse/JDK-8237372 Stats: 29 lines in 2 files changed: 21 ins; 0 del; 8 mod Patch: https://git.openjdk.java.net/jfx/pull/89.diff Fetch: git fetch https://git.openjdk.java.net/jfx pull/89/head:pull/89 PR: https://git.openjdk.java.net/jfx/pull/89
