Fixing self type creation

When compiling a classs, we pick up all instance variables.
Now that conditions and returns can be calls, that was broken, now fixed

lib/vool/return_statement.rb

@@ -8,7 +8,8 @@ module Vool
     end
 
     def each(&block)
-      block.call(@return_value)
+      block.call(self)
+      @return_value.each(&block)
     end
 
     # Since the return is normalized to only allow simple values it is simple.