Request for review: 8016302: Change type of the number of GC workers to unsigned int (2)

[Vladimir Kempik]

Hi all,

Could I have a couple of reviews for this change?

http://cr.openjdk.java.net/~vkempik/8016302/jdk7/8016302/webrev.00/

It's backport of https://bugs.openjdk.java.net/browse/JDK-8016302 to jdk7.

I made few additional changes: change return value of num_par_rem_sets() 
from int to uint (heapRegionRemSet.cpp), just like it is in jdk8. And 
changed few ints to uints where num_par_rem_sets were used.

Rest of changes just to adopt patch to jdk7.

Thanks,
Vladimir