When you expand a tempo template with ON-REGION (C-u)
then if the template uses 'r functionality i.e.
something like:

(tempo-define-template "example"
		       '("repeated value first=" 
                         (r "value " value) 
                         "second=" (s value) "]\n"))

r doesn't save anything in value so the second
expansion is empty. 

This patch saves the active region as value so it can
be used later in the template. I haven't written much
lisp before so it may need some tidying up.

Barney