fix code listener logic bug

next's position was only updated initially
previous logic relied on pushing everything long rightly
but it wasn't right, and no harm in setting position twice,
as events only fire if there is real change

lib/risc/linker.rb

@@ -69,7 +69,7 @@ module Risc
         previous.position_listener(objekt) if previous
         previous = position
         at += objekt.padded_length
-        log.debug "Object #{objekt.class}:#{before.to_s(16)} len: #{(at - before).to_s(16)}"
+        log.debug "Object #{objekt.class}:0x#{before.to_s(16)} len: #{(at - before).to_s(16)}"
       end
       at
     end