small fix to return gets recursive fibonacchi to work

lib/ast/return_expression.rb

@@ -15,8 +15,17 @@ module Ast
     end
     def compile context , into
       expression_value = expression.compile(context , into)
-      puts "compiled return expression #{expression_value.inspect}"
-      return expression_value
+      puts "compiled return expression #{expression_value.inspect}, now return in 7"
+      # copied from function expression: TODO make function
+
+      return_reg = Vm::Integer.new(7)
+      if expression_value.is_a?(Vm::IntegerConstant) or expression_value.is_a?(Vm::StringConstant)
+        return_reg.load into , expression_value if expression_value.register != return_reg.register
+      else
+        return_reg.move( into, expression_value ) if expression_value.register != return_reg.register
+      end
+      #function.set_return return_reg
+      return return_reg
     end
   end