Make xfrm functions that return a boolean value return bool

Make xfrm functions that return a boolean value return bool to allow gcc to
make better decisions.

Signed-off-by: David Howells <dhowells@redhat.com>

include/net/xfrm.h

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 36ac102..8b2d368 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -1658,10 +1658,10 @@
 }
 
 #ifdef CONFIG_XFRM
-static inline int xfrm_aevent_is_on(struct net *net)
+static inline bool xfrm_aevent_is_on(struct net *net)
 {
 	struct sock *nlsk;
-	int ret = 0;
+	bool ret = false;
 
 	rcu_read_lock();
 	nlsk = rcu_dereference(net->xfrm.nlsk);
@@ -1671,10 +1671,10 @@
 	return ret;
 }
 
-static inline int xfrm_acquire_is_on(struct net *net)
+static inline bool xfrm_acquire_is_on(struct net *net)
 {
 	struct sock *nlsk;
-	int ret = 0;
+	int ret = false;
 
 	rcu_read_lock();
 	nlsk = rcu_dereference(net->xfrm.nlsk);