netfilter: nfnetlink_queue: fix sparse warning due to missing include

This patch fixes a sparse warning due to missing include header file.

Change-Id: I55d011febe6bc4a26a7e6f76ae61f70a2ba5d7e8
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Kevin F. Haggerty <haggertk@lineageos.org>
1 file changed