c11 safe string handling support

Change-Id: Ied34720ca5a6e6e717eea4e86003e854031b6eab
Signed-off-by: Dave Barach <dave@barachs.net>
diff --git a/src/vnet/l2tp/l2tp.c b/src/vnet/l2tp/l2tp.c
index 300bd53..99ae6c4 100644
--- a/src/vnet/l2tp/l2tp.c
+++ b/src/vnet/l2tp/l2tp.c
@@ -334,7 +334,7 @@
     return VNET_API_ERROR_INVALID_VALUE;
 
   pool_get (lm->sessions, s);
-  memset (s, 0, sizeof (*s));
+  clib_memset (s, 0, sizeof (*s));
   clib_memcpy (&s->our_address, our_address, sizeof (s->our_address));
   clib_memcpy (&s->client_address, client_address,
 	       sizeof (s->client_address));