ipc.h struct layout fix

[Rich Felker]

On Fri, Jul 08, 2011 at 04:05:35PM +0200, Peter Mazinger wrote:
> > Can't we ensure that the necessary type is defined somewhere?
> 
> My understanding for a libc is that we try to expose to userspace a common interface, hiding specialities of the kernel.
> Let's see what others think...

It would have been nice if the kernel had simply exposed a common
kernelspace interface to begin with, instead of trying to be a clone
of every cpu-vendor-specific proprietary unix...

Rich