netfilter/queue: Add missing prototype for nfnl_queue_msg_build_verdi…

…ct_batch()

Add the function prototype for nfnl_queue_msg_build_verdict_batch() to
the public header.

This fixes the following GCC warning when building with
-Wmissing-prototypes:

  netfilter/queue_msg.c:190:1: warning: no previous prototype for ‘nfnl_queue_msg_build_verdict_batch’ [-Wmissing-prototypes]

Fixes: d612180 ("netfilter/queue: introduce nfnl_queue_msg_send_verdict_batch()")
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

include/netlink/netfilter/queue_msg.h

@@ -93,6 +93,8 @@ extern unsigned int		nfnl_queue_msg_get_verdict(const struct nfnl_queue_msg *);
 extern struct nl_msg *		nfnl_queue_msg_build_verdict(const struct nfnl_queue_msg *);
 extern int			nfnl_queue_msg_send_verdict(struct nl_sock *,
 							    const struct nfnl_queue_msg *);
+
+extern struct nl_msg *		nfnl_queue_msg_build_verdict_batch(const struct nfnl_queue_msg *msg);
 extern int			nfnl_queue_msg_send_verdict_batch(struct nl_sock *,
 							    const struct nfnl_queue_msg *);
 extern int			nfnl_queue_msg_send_verdict_payload(struct nl_sock *,