[cleanup] Convert XMALLOC/memset to XCALLOC

Simple conversion of XMALLOC/memset to XCALLOC
diff --git a/ospfd/ospf_api.c b/ospfd/ospf_api.c
index 9c9997b..7738319 100644
--- a/ospfd/ospf_api.c
+++ b/ospfd/ospf_api.c
@@ -99,8 +99,7 @@
 {
   struct msg *new;
 
-  new = XMALLOC (MTYPE_OSPF_API_MSG, sizeof (struct msg));
-  memset (new, 0, sizeof (struct msg));
+  new = XCALLOC (MTYPE_OSPF_API_MSG, sizeof (struct msg));
 
   new->hdr.version = OSPF_API_VERSION;
   new->hdr.msgtype = msgtype;
@@ -271,12 +270,7 @@
 struct msg_fifo *
 msg_fifo_new ()
 {
-  struct msg_fifo *new;
-
-  new = XMALLOC (MTYPE_OSPF_API_FIFO, sizeof (struct msg_fifo));
-  memset (new, 0, sizeof (struct msg_fifo));
-
-  return new;
+  return XCALLOC (MTYPE_OSPF_API_FIFO, sizeof (struct msg_fifo));
 }
 
 /* Add new message to fifo. */