netfilter: return booleans instead of integers

Return statements in functions returning bool should use
true/false instead of 1/0.

These issues were detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/nf_conncount.c

@@ -71,7 +71,7 @@ static inline bool already_closed(const struct nf_conn *conn)
 		return conn->proto.tcp.state == TCP_CONNTRACK_TIME_WAIT ||
 		       conn->proto.tcp.state == TCP_CONNTRACK_CLOSE;
 	else
-		return 0;
+		return false;
 }
 
 static int key_diff(const u32 *a, const u32 *b, unsigned int klen)

net/netfilter/xt_hashlimit.c

@@ -353,7 +353,7 @@ static int htable_create(struct net *net, struct hashlimit_cfg3 *cfg,
 static bool select_all(const struct xt_hashlimit_htable *ht,
 		       const struct dsthash_ent *he)
 {
-	return 1;
+	return true;
 }
 
 static bool select_gc(const struct xt_hashlimit_htable *ht,

net/netfilter/xt_ipcomp.c

@@ -58,7 +58,7 @@ static bool comp_mt(const struct sk_buff *skb, struct xt_action_param *par)
 		 */
 		pr_debug("Dropping evil IPComp tinygram.\n");
 		par->hotdrop = true;
-		return 0;
+		return false;
 	}
 
 	return spi_match(compinfo->spis[0], compinfo->spis[1],