[NETFILTER]: x_tables: switch xt_target->checkentry to bool

Switch the return type of target checkentry 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/ipv4/netfilter/ipt_REDIRECT.c b/net/ipv4/netfilter/ipt_REDIRECT.c
index 68cc76a1..2a04103 100644
--- a/net/ipv4/netfilter/ipt_REDIRECT.c
+++ b/net/ipv4/netfilter/ipt_REDIRECT.c
@@ -32,7 +32,7 @@
 #endif
 
 /* FIXME: Take multiple ranges --RR */
-static int
+static bool
 redirect_check(const char *tablename,
 	       const void *e,
 	       const struct xt_target *target,
@@ -43,13 +43,13 @@
 
 	if (mr->range[0].flags & IP_NAT_RANGE_MAP_IPS) {
 		DEBUGP("redirect_check: bad MAP_IPS.\n");
-		return 0;
+		return false;
 	}
 	if (mr->rangesize != 1) {
 		DEBUGP("redirect_check: bad rangesize %u.\n", mr->rangesize);
-		return 0;
+		return false;
 	}
-	return 1;
+	return true;
 }
 
 static unsigned int