[IPX]: Correct argument type of ipxrtr_delete().

A single caller passes __u32. Inside function "net" is compared with
__u32 (__be32 really, just wasn't annotated).
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipx/ipx_route.c

@@ -119,7 +119,7 @@ static int ipxrtr_create(struct ipx_route_definition *rd)
 	return rc;
 }
 
-static int ipxrtr_delete(long net)
+static int ipxrtr_delete(__u32 net)
 {
 	struct ipx_route *r, *tmp;
 	int rc;