should define _IOT__IOTBASE_unsigned and _IOT__IOTBASE_size_t

[Roland McGrath]

> Some applications use unsigned and size_t in ioctls, so bits/ioctls.h
> should define _IOT__IOTBASE_unsigned and _IOT__IOTBASE_size_t, here is a
> patch.

What "applications"?  The _IO* macros are not for applications to use, they
are for the standard installed header files only.  

In future please insert the canonical bz references in your log entries:

> 2007-07-21  Samuel Thibault  <samuel.thibault@ens-lyon.org>
> 
	[BZ #4719]
> 	* libc/sysdeps/mach/hurd/bits/iotls.h (_IOT__IOTBASE_unsigned,
> 	_IOT__IOTBASE_size_t): New macros.


Thanks,
Roland