8139768: Running with -XX:CMSOldPLABNumRefills=2147483648 causes EXCEPTION_INT_DIVIDE_BY_ZERO on Windows i586 Summary: Use double arithmetic to avoid integer overflow Reviewed-by: jwilhelm, tbenson

^build/
^dist/
^drop/
^drop_included/
^webrev
/nbproject/private/
^.hgtip