readd include for safety.

src/include/access/htup.h

@@ -6,13 +6,14 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: htup.h,v 1.21 1999/07/04 05:47:06 momjian Exp $
+ * $Id: htup.h,v 1.22 1999/07/12 13:32:38 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
 #ifndef HTUP_H
 #define HTUP_H
 
+#include <utils/nabstime.h>
 #include <storage/bufpage.h>
 #include <storage/itemptr.h>
 #include <utils/memutils.h>