net: fix dummy 'nf_conntrack_event_cache()'

The dummy version of 'nf_conntrack_event_cache()' (used when the
NF_CONNTRACK_EVENTS config option is not enabled) had not been updated
when the calling convention changed.

This was introduced by commit a71996fccce4b2086a26036aa3c915365ca36926
("netfilter: netns nf_conntrack: pass conntrack to
nf_conntrack_event_cache() not skb")

Tssk.

Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Patrick McHardy <kaber@trash.net>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/net/netfilter/nf_conntrack_ecache.h

@@ -63,7 +63,7 @@ extern void nf_conntrack_ecache_fini(struct net *net);
 #else /* CONFIG_NF_CONNTRACK_EVENTS */
 
 static inline void nf_conntrack_event_cache(enum ip_conntrack_events event,
-					    const struct sk_buff *skb) {}
+					    struct nf_conn *ct) {}
 static inline void nf_conntrack_event(enum ip_conntrack_events event,
 				      struct nf_conn *ct) {}
 static inline void nf_ct_deliver_cached_events(const struct nf_conn *ct) {}