[NETFILTER] ipv4: small cleanups

This patch contains the following cleanups:
- make needlessly global code static
- ip_conntrack_core.c: ip_conntrack_flush() -> ip_conntrack_flush(void)
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/netfilter/ip_conntrack_core.c

@@ -1354,7 +1354,7 @@ static void free_conntrack_hash(struct list_head *hash, int vmalloced,int size)
 			   get_order(sizeof(struct list_head) * size));
 }
 
-void ip_conntrack_flush()
+void ip_conntrack_flush(void)
 {
 	/* This makes sure all current packets have passed through
            netfilter framework.  Roll on, two-stage module
@@ -1408,7 +1408,7 @@ static struct list_head *alloc_hashtable(int size, int *vmalloced)
 	return hash;
 }
 
-int set_hashsize(const char *val, struct kernel_param *kp)
+static int set_hashsize(const char *val, struct kernel_param *kp)
 {
 	int i, bucket, hashsize, vmalloced;
 	int old_vmalloced, old_size;

net/ipv4/netfilter/ip_nat_core.c

@@ -49,7 +49,7 @@ static unsigned int ip_nat_htable_size;
 static struct list_head *bysource;
 
 #define MAX_IP_NAT_PROTO 256
-struct ip_nat_protocol *ip_nat_protos[MAX_IP_NAT_PROTO];
+static struct ip_nat_protocol *ip_nat_protos[MAX_IP_NAT_PROTO];
 
 static inline struct ip_nat_protocol *
 __ip_nat_proto_find(u_int8_t protonum)

net/ipv4/netfilter/ipt_LOG.c

@@ -351,7 +351,7 @@ static void dump_packet(const struct nf_loginfo *info,
 	/* maxlen = 230+   91  + 230 + 252 = 803 */
 }
 
-struct nf_loginfo default_loginfo = {
+static struct nf_loginfo default_loginfo = {
 	.type	= NF_LOG_TYPE_LOG,
 	.u = {
 		.log = {