First part of int allocation

implemented allocate_int
instead of add_new_int

lib/mom/instruction/message_setup.rb

@@ -71,6 +71,9 @@ module Mom
         next_message_reg! << next_message[:next_message]
         factory[:next_object] << next_message_reg
 
+        # FIXME: Also we relink used messages at the moment. This will have to stop
+        #        when implementing continuations (or block passing/bindings)
+        #        then we may run out and that means cheking and maybe getting more
         message[:next_message] << next_message
         next_message[:caller] << message
         next_message[:method] << callable

lib/mom/instruction/return_sequence.rb

@@ -27,6 +27,8 @@ module Mom
         caller_reg! << message[:caller]
         caller_reg[:return_value] << object
         factory? << Parfait.object_space.get_factory_for(:Message)
+        # here we return the current message to the list of messages
+        # which is only correct without blocks or real continuations
         next_message! << factory[:next_object]
         message[:next_message] << next_message
         factory[:next_object] << message