Use re-export' instead of export' for re-exported core bindings. Do

not re-export `numerator', `denominator' and `rationalize' since Guile
does not have them.  Continue to use `export' for `null-environment'.

ice-9/safe-r5rs.scm

@@ -48,7 +48,7 @@
 
 (module-use! %module-public-interface null-interface)
 
-(export eqv? eq? equal?
+(re-export eqv? eq? equal?
 	   number?	complex? real? rational? integer?
 	   exact? inexact?
 	   = < > <= >=
@@ -58,9 +58,9 @@
 	   abs
 	   quotient remainder modulo
 	   gcd lcm
-	numerator denominator
+	   ;;numerator denominator XXX
+	   ;;rationalize           XXX
 	   floor ceiling truncate round
-	rationalize
 	   exp log sin cos tan asin acos atan
 	   sqrt
 	   expt
@@ -136,7 +136,6 @@
 	   dynamic-wind
 	   
 	   eval
-	null-environment
 
 	   input-port? output-port?
 	   current-input-port current-output-port
@@ -156,6 +155,8 @@
 	   ;;transcript-off
 	   )
 
+(export null-environment)
+
 (define (null-environment n)
   (if (not (= n 5))
       (scm-error 'misc-error 'null-environment