[NETFILTER]: x_tables: switch xt_match->match to bool

Switch the return type of match functions to boolean

Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netfilter/xt_string.c b/net/netfilter/xt_string.c
index 7552d89..3aea43d 100644
--- a/net/netfilter/xt_string.c
+++ b/net/netfilter/xt_string.c
@@ -21,14 +21,14 @@
 MODULE_ALIAS("ipt_string");
 MODULE_ALIAS("ip6t_string");
 
-static int match(const struct sk_buff *skb,
-		 const struct net_device *in,
-		 const struct net_device *out,
-		 const struct xt_match *match,
-		 const void *matchinfo,
-		 int offset,
-		 unsigned int protoff,
-		 bool *hotdrop)
+static bool match(const struct sk_buff *skb,
+		  const struct net_device *in,
+		  const struct net_device *out,
+		  const struct xt_match *match,
+		  const void *matchinfo,
+		  int offset,
+		  unsigned int protoff,
+		  bool *hotdrop)
 {
 	const struct xt_string_info *conf = matchinfo;
 	struct ts_state state;