HJ's patch to libio works on Red Hat 4.2/libc 5.3.12

[Joe Buck]

> > I seem to have an additional problem however. The attched stripped
> > down code core dumps on a i386-linux-gnulibc1 box with libc 5.3.12 
> > (RH 4.2). I've also attched the backtrace from gdb.

HJ:
> I think somehow your libstdc++ is miscompiled.

I get the exact same failure.  Just in case there was a compilation
problem, I blew away and recompiled the libraries.  The crash is still
there.

Joe