If only a leftover `char` remains in the stream, do not add `-1` to the return value in `lockedRead()`.
------------- Commit messages: - 8287003: InputStreamReader::read() can return zero despite writing a char in the buffer Changes: https://git.openjdk.java.net/jdk/pull/8895/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8895&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8287003 Stats: 33 lines in 2 files changed: 24 ins; 1 del; 8 mod Patch: https://git.openjdk.java.net/jdk/pull/8895.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/8895/head:pull/8895 PR: https://git.openjdk.java.net/jdk/pull/8895
