netfilter: nf_conntrack_ipv6: fix comment for packets without data
netfilter: nf_conntrack_ipv6: fix comment for packets without data

Remove ambiguity of double negation.

Signed-off-by: Florent Fourcot <787ae617617698b2b89c353cdfb3f2e4d16ffeb7@enst-bretagne.fr>
Acked-by: Rick Jones <fa592e45dbbefecd81487d38d3b31972a5de8c36@hp.com>
Signed-off-by: Pablo Neira Ayuso <707d14912bb250caf67dfe0ea4035681fbfc4f56@netfilter.org>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas