RFR: JDK-8294702 - BufferedInputStream.transferTo uses undefined value range for markpos

[Markus KARG]

Fixes JDK-8294702

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Commit messages:
 - Fixes JDK-8294702

Changes: https://git.openjdk.org/jdk/pull/10528/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10528&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8294702
  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/10528.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10528/head:pull/10528

PR: https://git.openjdk.org/jdk/pull/10528