[plt-scheme] How to find the value associated to a symbol via an identifier ?

From: Andre Mayers (andre.mayers at usherbrooke.ca)
Date: Sun Feb 15 21:21:29 EST 2009

I would like to define "find-symbol-value", a function or a macro that will
do the following 

(define id45 45)
(define idid 'id45)

(define (find-symbol-value symb)

(find-symbol-value idid)
; ==> 45 

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