Fix ia64/sys/ucontext.h für g++ 3.5

[Jakub Jelinek]

On Wed, Sep 01, 2004 at 02:06:53PM -0700, Ulrich Drepper wrote:
> Andreas Schwab wrote:
> 
> > If it's ok to include that here, sure.
> 
> It's not OK, POSIX does not allow this.

Can't it just use the hardcoded value (0xc8 or what was it) and
do a glibc compile time check somewhere that it is the correct value?
I mean, struct sigcontext shouldn't be changing at all, otherwise we're in
big trouble compatibility wise.

	Jakub