c11 safe string handling support

Change-Id: Ied34720ca5a6e6e717eea4e86003e854031b6eab
Signed-off-by: Dave Barach <dave@barachs.net>
diff --git a/src/vnet/dhcp/dhcp6_pd_client_dp.c b/src/vnet/dhcp/dhcp6_pd_client_dp.c
index 009de4a..9fb6096 100644
--- a/src/vnet/dhcp/dhcp6_pd_client_dp.c
+++ b/src/vnet/dhcp/dhcp6_pd_client_dp.c
@@ -523,7 +523,7 @@
 		sizeof (vl_api_dhcp6_pd_prefix_info_t);
 	      vl_api_dhcp6_pd_reply_event_t *event =
 		clib_mem_alloc (event_size);
-	      memset (event, 0, event_size);
+	      clib_memset (event, 0, event_size);
 
 	      event->sw_if_index = htonl (events[i].body.sw_if_index);
 	      event->server_index = htonl (events[i].body.server_index);