RFR: 8217257: ZGC: Minor cleanup of ZBarrierSetC2

[Thomas Schatzl]

Hi,

On Wed, 2019-01-16 at 15:59 +0100, Per Liden wrote:
> Minor style/cosmetic cleanups of ZBarrierSetC2.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8217257
> Webrev: http://cr.openjdk.java.net/~pliden/8217257/webrev.0
> 
> /Per

  cleanups look good.

Thomas