style: removed a separate block in rip6_output, which was just for defining a local variable.  The block (and the entire function) is not so large, so the readability would not be decreased.
style: removed a separate block in rip6_output, which was just for
defining a local variable.  The block (and the entire function) is not so
large, so the readability would not be decreased.

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