Compiler warnings fixes.
diff --git a/ospfd/ospf_dump.c b/ospfd/ospf_dump.c
index 3711e9f..958baa4 100644
--- a/ospfd/ospf_dump.c
+++ b/ospfd/ospf_dump.c
@@ -649,7 +649,7 @@
       break;
     case OSPF_AUTH_SIMPLE:
       memset (buf, 0, 9);
-      strncpy (buf, ospfh->u.auth_data, 8);
+      strncpy (buf, (char *) ospfh->u.auth_data, 8);
       zlog_info ("  Simple Password %s", buf);
       break;
     case OSPF_AUTH_CRYPTOGRAPHIC: