8167659: Access of mark word should use oopDesc::mark_offset_in_bytes() instead of '0' Summary: Use oopDesc::mark_offset_in_bytes() when addressing mark word, instead of '0'. Reviewed-by: dholmes, coleenp

^build/
^dist/
^webrev
^testoutput/
/nbproject/private/
^make/netbeans/.*/build/
^make/netbeans/.*/dist/
.DS_Store
.*/JTreport/.*
.*/JTwork/.*