hg: jdk7/hotspot-gc/hotspot: 7036021: G1: build failure on win64 and linux with hs21 in jdk6 build environment

[john.cuthbertson at oracle.com]

Changeset: edd9b016deb6
Author:    johnc
Date:      2011-04-15 10:10 -0700
URL:       http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/edd9b016deb6

7036021: G1: build failure on win64 and linux with hs21 in jdk6 build environment
Summary: Missing parentheses around a casted expression and some missing casts were causing build failures with the jdk6 build tools.
Reviewed-by: kvn, brutisso

! src/share/vm/gc_implementation/g1/concurrentG1Refine.hpp
! src/share/vm/opto/library_call.cpp