ipv4: Pass ipv4 flow objects into fib_lookup() paths.

To start doing these conversions, we need to add some temporary
flow4_* macros which will eventually go away when all the protocol
code paths are changed to work on AF specific flowi objects.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 79179ad..a721013 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -569,7 +569,7 @@
 			/* It is not necessary, but requires a bit of thinking */
 			if (fl.fl4_scope < RT_SCOPE_LINK)
 				fl.fl4_scope = RT_SCOPE_LINK;
-			err = fib_lookup(net, &fl, &res);
+			err = fib_lookup(net, &fl.u.ip4, &res);
 			if (err) {
 				rcu_read_unlock();
 				return err;