[jdk15u-dev] RFR: 8266206: Build failure after JDK-8264752 with older GCCs

[Ekaterina Vergizova]

I'd like to backport JDK-8266206 to 15u as follow-up fix for JDK-8264752 that is already included to 15u.
The patch applies cleanly.
Build with GCC 7.5.0 fails without the patch, passes with it.

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Commit messages:
 - Backport 21f65f8e79b25b8367fc8d177b5f156b3575c89e

Changes: https://git.openjdk.java.net/jdk15u-dev/pull/110/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk15u-dev&pr=110&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8266206
  Stats: 4 lines in 1 file changed: 1 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk15u-dev/pull/110.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk15u-dev pull/110/head:pull/110

PR: https://git.openjdk.java.net/jdk15u-dev/pull/110