RFR: 9+8u: ShenandoahHeap::_cancelled_gc should be consistently treated as jbyte

[Roman Kennke]

Am 21.03.2017 um 16:07 schrieb Aleksey Shipilev:
> Hi,
>
> Compilers do complain when you use jbyte and bools interchangeably. Also we cast
> out constness in setters, what-what? MSVC fails Windows build.
>
> Fix:
>   http://cr.openjdk.java.net/~shade/shenandoah/build/cancel-gc-jbyte/webrev.01/
>
> This affects both 9 and 8u.
>
> Testing: hotspot_gc_shenandoah, 9 and 8u
>
> Thanks,
> -Aleksey
>
>
Looks reasonable. Yes.