remove the last_object from chain

also tried to keep the first around as was done in space
partially to not have to add the consrtants seperately
didn't work, as chain gets broken
also this has to be redone anyway

lib/risc/collector.rb

@@ -6,7 +6,9 @@ module Risc
   module Collector
     def self.collect_space(linker)
       keep Parfait.object_space , 0
-      linker.constants.each {|obj| keep(obj,0)}
+      linker.constants.each do |obj|
+        keep(obj,0)
+      end
       Position.positions
     end