increase binary_code size to 32

save a few jump, adds some size to binary
16 just seemed kind of small

test/risc/position/test_code_position.rb

@@ -11,13 +11,13 @@ module Risc
     end
 
     def test_bin_propagates_existing
-      @binary.extend_to(16)
+      @binary.extend_to(32)
       CodeListener.init( @binary , :interpreter).set(0)
       assert_equal @binary.padded_length , Position.get(@binary.next_code).at
     end
     def test_bin_propagates_after
       CodeListener.init( @binary , :interpreter).set(0)
-      @binary.extend_to(16)
+      @binary.extend_to(32)
       assert_equal @binary.padded_length , Position.get(@binary.next_code).at
     end
   end