- removed an unused variable - in make_mld6_msg, use the passed code to set to the mld6 code field
- removed an unused variable
- in make_mld6_msg, use the passed code to set to the mld6 code field

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame