[cleanup] Convert XMALLOC/memset to XCALLOC

Simple conversion of XMALLOC/memset to XCALLOC
diff --git a/ospf6d/ospf6_lsa.c b/ospf6d/ospf6_lsa.c
index 87df741..e8290b6 100644
--- a/ospf6d/ospf6_lsa.c
+++ b/ospf6d/ospf6_lsa.c
@@ -468,8 +468,7 @@
   /* LSA information structure */
   /* allocate memory */
   lsa = (struct ospf6_lsa *)
-    XMALLOC (MTYPE_OSPF6_LSA, sizeof (struct ospf6_lsa));
-  memset (lsa, 0, sizeof (struct ospf6_lsa));
+    XCALLOC (MTYPE_OSPF6_LSA, sizeof (struct ospf6_lsa));
 
   lsa->header = (struct ospf6_lsa_header *) new_header;
 
@@ -498,8 +497,7 @@
   /* LSA information structure */
   /* allocate memory */
   lsa = (struct ospf6_lsa *)
-    XMALLOC (MTYPE_OSPF6_LSA, sizeof (struct ospf6_lsa));
-  memset (lsa, 0, sizeof (struct ospf6_lsa));
+    XCALLOC (MTYPE_OSPF6_LSA, sizeof (struct ospf6_lsa));
 
   lsa->header = (struct ospf6_lsa_header *) new_header;
   SET_FLAG (lsa->flag, OSPF6_LSA_HEADERONLY);