Fix incorrect prototype for ipxrtr_route_packet()

The function ipxrtr_route_packet() takes a 'len' argument of type
size_t. However, its prototype in af_ipx.c incorrectly suggests that the
corresponding argument is of type 'int' instead.

Discovered by building with --combine and letting the compiler see it
all at once.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

net/ipx/af_ipx.c

@@ -87,7 +87,7 @@ extern int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc,
 			    unsigned char *node);
 extern void ipxrtr_del_routes(struct ipx_interface *intrfc);
 extern int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx,
-			       struct iovec *iov, int len, int noblock);
+			       struct iovec *iov, size_t len, int noblock);
 extern int ipxrtr_route_skb(struct sk_buff *skb);
 extern struct ipx_route *ipxrtr_lookup(__be32 net);
 extern int ipxrtr_ioctl(unsigned int cmd, void __user *arg);