c11 safe string handling support

Change-Id: Ied34720ca5a6e6e717eea4e86003e854031b6eab
Signed-off-by: Dave Barach <dave@barachs.net>
diff --git a/src/vnet/flow/flow.c b/src/vnet/flow/flow.c
index c4f57a2..485a845 100644
--- a/src/vnet/flow/flow.c
+++ b/src/vnet/flow/flow.c
@@ -82,7 +82,7 @@
   /* *INDENT-ON* */
 
   hash_free (f->private_data);
-  memset (f, 0, sizeof (*f));
+  clib_memset (f, 0, sizeof (*f));
   pool_put (fm->global_flow_pool, f);
   return 0;
 }