get block resolution to use the extra

block_compiler puts in the extra, that we get out when resolving the type
Thus block args work, though only by assuming direct call

lib/risc/callable_compiler.rb

@@ -66,7 +66,7 @@ module Risc
     end
 
     # resolve the type of the slot, by inferring from it's name, using the type
-    # scope related slots are resolved by the compiler by methood/block
+    # scope related slots are resolved by the compiler by method/block
     def slot_type( slot , type)
       case slot
       when :frame