[NETNS]: Add namespace parameter to ip_dev_find.

in_dev_find() need a namespace to pass it to fib_get_table(), so add
an argument.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 82817e5..754b0a5 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -594,7 +594,7 @@
 				err = 0;
 				break;
 			}
-			dev = ip_dev_find(mreq.imr_address.s_addr);
+			dev = ip_dev_find(&init_net, mreq.imr_address.s_addr);
 			if (dev) {
 				mreq.imr_ifindex = dev->ifindex;
 				dev_put(dev);