RFR(XS): 8175900: Assertion too strict in G1CollectedHeap::new_mutator_alloc_region

[Kim Barrett]

> On Feb 27, 2017, at 12:10 PM, Volker Simonis <volker.simonis at gmail.com> wrote:
> 
> Hi,
> 
> can I please have a review and sponsor for the following tiny change:
> 
> http://cr.openjdk.java.net/~simonis/webrevs/2017/8175900/
> https://bugs.openjdk.java.net/browse/JDK-8175900

looks good