add string.h (for memset)

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@9699 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/asn1/libasn1.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997 Kungliga Tekniska H<>gskolan
+ * Copyright (c) 1997 - 2001 Kungliga Tekniska H<>gskolan
  * (Royal Institute of Technology, Stockholm, Sweden). 
  * All rights reserved. 
  *
@@ -41,6 +41,7 @@
 #endif
 
 #include <stdlib.h>
+#include <string.h>
 #include <errno.h>
 #include "asn1.h"
 #include "der.h"