This addresses https://bugs.openjdk.java.net/browse/JDK-8246348
------------- Commit messages: - Add check for 0 in text - allow different TextRuns to share the same UTF 16 text, but create separate - Use number of real characters when obtaining pointers in a string. Changes: https://git.openjdk.java.net/jfx/pull/249/files Webrev: https://webrevs.openjdk.java.net/jfx/249/webrev.00 Issue: https://bugs.openjdk.java.net/browse/JDK-8246348 Stats: 44 lines in 4 files changed: 37 ins; 1 del; 6 mod Patch: https://git.openjdk.java.net/jfx/pull/249.diff Fetch: git fetch https://git.openjdk.java.net/jfx pull/249/head:pull/249 PR: https://git.openjdk.java.net/jfx/pull/249
