IPv6: incorrect routing header should yield ICMP6_PARAMPROB_HEADER

[Mike Belopuhov]

According to the RFC 2460 and RFC 5095, ICMP Parameter Problem, Code 0
should be sent, not Code 2.  OK?

(while at the spot, kill a trailing whitespace)

diff --git sys/netinet6/ip6_input.c sys/netinet6/ip6_input.c
index 6afde60..e554ad7 100644
--- sys/netinet6/ip6_input.c
+++ sys/netinet6/ip6_input.c
@@ -328,12 +328,12 @@ ip6_input(struct mbuf *m)
                ip6stat.ip6s_badoptions++;
                in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
                in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
-               icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, 0);
+               icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER, 0);
                /* m is already freed */
                return;
        }
 
-#if NPF > 0 
+#if NPF > 0
         /*
          * Packet filter
          */