RFR: 8214202: DirtyCardQueueSet::get_completed_buffer should not clear _process_completed

[Thomas Schatzl]

Hi,

On Thu, 2018-11-22 at 02:04 -0500, Kim Barrett wrote:
> Please review this small fix for get_completed_buffer.  As discussed
> in the CR, it should not be setting _process_completed to false when
> the stop_at limit has been reached.
> 
> While I was there, simplified the code a little, eliminating an
> unnecessary NULL test.
> 
> Also fixed a mistaken use of _process_completed in an assert message,
> spotted while examining all uses of that variable.
> 
> CR:
> https://bugs.openjdk.java.net/browse/JDK-8214202
> 
> Webrev:
> http://cr.openjdk.java.net/~kbarrett/8214202/open.00/
> 
> Testing:
> mach5 tier1-3.
> 

  looks good to me.

Thanks,
  Thomas