c11 safe string handling support

Change-Id: Ied34720ca5a6e6e717eea4e86003e854031b6eab
Signed-off-by: Dave Barach <dave@barachs.net>
diff --git a/src/vnet/bier/bier_fmask_db.c b/src/vnet/bier/bier_fmask_db.c
index 59e2973..0ee1e5d 100644
--- a/src/vnet/bier/bier_fmask_db.c
+++ b/src/vnet/bier/bier_fmask_db.c
@@ -60,7 +60,7 @@
      * Depending on what the ID is there may be padding.
      * This key will be memcmp'd in the mhash, so make sure it's all 0
      */
-    memset(key, 0, sizeof(*key));
+    clib_memset(key, 0, sizeof(*key));
 
     /*
      * Pick the attributes from the path that make the FMask unique