RFR: 8208676: Consistent crash when getting event on NetworkPerformanceInterface::NetworkPerformance::network_utilization

[Robin Westberg]

Hi all,

Please review the following fix for this network utilization related crash that occurs when the system has a network interface without any address configured (linux specific).

Issue: https://bugs.openjdk.java.net/browse/JDK-8208676 <https://bugs.openjdk.java.net/browse/JDK-8208676>
Webrev: http://cr.openjdk.java.net/~rwestberg/8208676/webrev.00/ <http://cr.openjdk.java.net/~rwestberg/8208676/webrev.00/>
Testing: jdk.jfr.event.runtime.* on linux-x64, linux-x64-debug

Best regards,
Robin