netfilter: ip6t_SYNPROXY: unnecessary to check whether ip6_route_output returns NULL
ip6_route_output() will never return a NULL pointer, so there's no need to check it. Signed-off-by: NLiping Zhang <liping.zhang@spreadtrum.com> Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>
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