Include <sys/time.h> for correctness. BDE has a better version of this,

but it's more complex, and in his words

    Commit your version, since it is the only one that is clearly permitted
    (if not best), and I'll untangle it later.

PR:		docs/11589
Reviewed by:	Bruce "he kicks ass" Evans

sys/sys/aio.h

@@ -13,12 +13,13 @@
  * bad that happens because of using this software isn't the responsibility
  * of the author.  This software is distributed AS-IS.
  *
- * $Id: aio.h,v 1.8 1998/04/12 03:09:43 dyson Exp $
+ * $Id: aio.h,v 1.9 1999/01/17 22:33:08 dt Exp $
  */
 
 #ifndef _SYS_AIO_H_
 #define	_SYS_AIO_H_
 
+#include <sys/time.h>
 #include <sys/types.h>
 #include <sys/signal.h>