Problem with obj->string Change in sid-cpu.scm

[Dave Brolley]

I'm having a problem with the change below. Guile is complaining that 
obj->string is not bound. My version of guile is:

 >> guile --version
Guile 1.3
Copyright (c) 1995, 1996, 1997 Free Software Foundation

Should I be using something newer or is there a way to accomplish the 
same thing more portably?

Thanks,
Dave
------------------------------------------------
2005-12-28  Nathan Sidwell  <nathan@codesourcery.com>
 
        * sid-cpu.scm (-gen-hw-stream-and-destream-fns): Stringize mode
        for concatenation.
        (-hw-gen-write-stack-decl): Likewise.