[PATCH]: net-2.6.26 IPv6 build fix

I just checked the following build warning fix into
net-2.6.26

commit f59d43899e279c77924a7ada4bec8c70e5aeca06
Author: David S. Miller [off-list ref]
Date:   Wed Mar 5 20:58:10 2008 -0800

    [IPV6]: Fix powerpc allmodconfig build warnings.
    
    Introduced by changeset 95e41e93e18d8e1e272ce23d96bae4f17ce11d42
    ("[IPV6]: Make ndisc_flow_init() common for later use.")
    
    Reported by Stephen Rothwell.
    
    In file included from net/ipv6/netfilter/ip6_tables.c:21:
    include/linux/icmpv6.h:192: warning: 'struct in6_addr' declared inside parameter list
    include/linux/icmpv6.h:192: warning: its scope is only this definition or declaration, which is probably not what you want
    
    Signed-off-by: David S. Miller [off-list ref]

diff --git a/include/linux/icmpv6.h b/include/linux/icmpv6.h
index e4d4300..0306744 100644
--- a/include/linux/icmpv6.h
+++ b/include/linux/icmpv6.h

@@ -184,6 +184,7 @@ extern void				icmpv6_param_prob(struct sk_buff *skb,
 							  int code, int pos);
 
 struct flowi;
+struct in6_addr;
 extern void				icmpv6_flow_init(struct sock *sk,
 							 struct flowi *fl,
 							 u8 type,