[NETFILTER]: x_tables: switch xt_match->checkentry 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_connmark.c b/net/netfilter/xt_connmark.c
index 3321b80..94d5251 100644
--- a/net/netfilter/xt_connmark.c
+++ b/net/netfilter/xt_connmark.c
@@ -51,7 +51,7 @@
 	return (((ct->mark) & info->mask) == info->mark) ^ info->invert;
 }
 
-static int
+static bool
 checkentry(const char *tablename,
 	   const void *ip,
 	   const struct xt_match *match,
@@ -62,14 +62,14 @@
 
 	if (cm->mark > 0xffffffff || cm->mask > 0xffffffff) {
 		printk(KERN_WARNING "connmark: only support 32bit mark\n");
-		return 0;
+		return false;
 	}
 	if (nf_ct_l3proto_try_module_get(match->family) < 0) {
 		printk(KERN_WARNING "can't load conntrack support for "
 				    "proto=%d\n", match->family);
-		return 0;
+		return false;
 	}
-	return 1;
+	return true;
 }
 
 static void