passing compiler to to_mom, not method

To be able to delegate scope (block/method) things later

lib/vool/statement.rb

@@ -52,13 +52,13 @@ module Vool
     def normalize
       raise "should not be normalized #{self}"
     end
-    def to_mom(method)
+    def to_mom(compiler)
       raise "should not be momed #{self}"
     end
 
     # for loading into a lot, return the "slot_definition" that can be passed to
     # SlotLoad.
-    def slot_definition(method)
+    def slot_definition(compiler)
       raise "not iplemented in #{self}"
     end