[IPV4] igmp: Fixup struct ip_mc_list::multiaddr type

All users except two expect 32-bit big-endian value. One is of

	->multiaddr = ->multiaddr

variety. And last one is "%08lX".

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/igmp.h b/include/linux/igmp.h
index 28f4f3b..899c3d4 100644
--- a/include/linux/igmp.h
+++ b/include/linux/igmp.h
@@ -169,7 +169,7 @@
 struct ip_mc_list
 {
 	struct in_device	*interface;
-	unsigned long		multiaddr;
+	__be32			multiaddr;
 	struct ip_sf_list	*sources;
 	struct ip_sf_list	*tomb;
 	unsigned int		sfmode;