udp: add struct net argument to udp_hashfn

Every caller already has this one. The new argument is currently 
unused, but this will be fixed shortly.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/udp.h b/include/linux/udp.h
index 9c94312..3deccac 100644
--- a/include/linux/udp.h
+++ b/include/linux/udp.h
@@ -46,7 +46,7 @@
 
 #define UDP_HTABLE_SIZE		128
 
-static inline int udp_hashfn(const unsigned num)
+static inline int udp_hashfn(struct net *net, const unsigned num)
 {
 	return num & (UDP_HTABLE_SIZE - 1);
 }