git: openjdk/jdk15u-dev: 8255992: JFR EventWriter does not use first string from StringPool with id 0

[Ekaterina Vergizova]

Changeset: f77ca300
Author:    Ekaterina Vergizova <evergizova at openjdk.org>
Date:      2021-06-04 08:59:12 +0000
URL:       https://git.openjdk.java.net/jdk15u-dev/commit/f77ca300bb5c6c45de6b27a63d9cb2da37d70c2b

8255992: JFR EventWriter does not use first string from StringPool with id 0

Backport-of: c85c9ad1f1b1b7aa358c587b654a2030927a65a8

! src/jdk.jfr/share/classes/jdk/jfr/internal/StringPool.java