use instruction steam from message

had been attached there last week, but was still used mainly through
the source (which i’m trying to remove)

lib/register/builtin/kernel.rb

@@ -9,7 +9,7 @@ module Register
           function = MethodSource.create_method(:Kernel,:__init__ , [])
           # no method enter or return (automatically added), remove
           new_start = Label.new(function , "__init__" )
-          function.source.instructions = new_start
+          function.instructions = new_start
           function.source.current = new_start
 
           #Set up the Space as self upon init