Request for reviews (S): 6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86

[John Coomes]

Vladimir Kozlov (vladimir.kozlov at oracle.com) wrote:
> http://cr.openjdk.java.net/~kvn/6730276/webrev
> 
> Fixed 6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
> 
> Replace assert_non_zero with if (count == 0) return.

The code change is fine, as long as there's no performance hit in GC.
The heaviest user of these routines is GC, and we call only when
there's something to copy.

-John