[PATCH] rtnetlink.3: fix example code, use RTA_LENGTH macro

[Simon Paillard <spaillard@xxxxxxxxxx>]

>From Kirill Brilliantov, http://bugs.debian.org/655088
---
 man3/rtnetlink.3 |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/man3/rtnetlink.3 b/man3/rtnetlink.3
index 29d7765..ada93e2 100644
--- a/man3/rtnetlink.3
+++ b/man3/rtnetlink.3
@@ -109,7 +109,7 @@ Creating a rtnetlink message to set the MTU of a device:
     rta = (struct rtattr *)(((char *) &req) +
                              NLMSG_ALIGN(req.nh.nlmsg_len));
     rta\->rta_type = IFLA_MTU;
-    rta\->rta_len = sizeof(unsigned int);
+    rta\->rta_len = RTA_LENGTH(sizeof(unsigned int));
     req.n.nlmsg_len = NLMSG_ALIGN(req.nh.nlmsg_len) +
                                   RTA_LENGTH(sizeof(mtu));
     memcpy(RTA_DATA(rta), &mtu, sizeof(mtu));
-- 
1.7.2.5

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