RFR: Fix compilation errors on Windows

[Aleksey Shipilev]

On 02/27/2018 03:48 AM, Zhengyu Gu wrote:
> The patch fixes compilation errors of current shenandoah jdk repo.
> 
> Webrev: http://cr.openjdk.java.net/~zgu/shenandoah/sh-jdk-build/webrev.00/

*) Not very sure this is the right thing to do:

   50     _next = *const_cast<ShenandoahStrDedupEntry* volatile*>(&next);

It seems to me that the "volatile" is not need in the original cast, so it is just:

  50     _next = static_cast<ShenandoahStrDedupEntry* volatile>(next);

?

*) So the cast to (int) is needed for write_ref_array_pre, but not for write_ref_array?

 112   ((ShenandoahBarrierSet*) BarrierSet::barrier_set())->write_ref_array((HeapWord*) dst, length);


Otherwise OK.

-Aleksey