Pull in <sys/types.h> for the benefit of those things which include

<machine/sysarch.h> but don't pull in <sys/types.h>.

sys/arch/alpha/include/bus.h

@@ -1,4 +1,4 @@
-/* $NetBSD: bus.h,v 1.35 2000/02/26 18:53:12 thorpej Exp $ */
+/* $NetBSD: bus.h,v 1.36 2000/02/26 20:12:56 thorpej Exp $ */
 
 /*-
  * Copyright (c) 1997, 1998, 2000 The NetBSD Foundation, Inc.
@@ -67,6 +67,8 @@
 #ifndef _ALPHA_BUS_H_
 #define	_ALPHA_BUS_H_
 
+#include <sys/types.h>
+
 #ifdef _KERNEL
 /*
  * Turn on BUS_SPACE_DEBUG if the global DEBUG option is enabled.