hg: code-tools/jmh: Should not return null with Runner.run(), return empty collection instead.

[aleksey.shipilev at oracle.com]

Changeset: 44b34803e101
Author:    shade
Date:      2014-04-10 22:53 +0400
URL:       http://hg.openjdk.java.net/code-tools/jmh/rev/44b34803e101

Should not return null with Runner.run(), return empty collection instead.

! jmh-core/src/main/java/org/openjdk/jmh/runner/Runner.java