start passing positions along inside the position code

test/arm/test_call.rb

@@ -20,7 +20,7 @@ module Arm
       bin = Parfait::BinaryCode.new(1)
       Risc::Position.set(bin , 0x20)
       code = @machine.call(	bin ,{} )#this jumps to the next instruction
-      Risc::Position.set(code , 0)
+      Risc::Position.set(code , 0, 1)
       assert_code code , :call, [0x09,0x0,0x0,0xeb]
     end
     def test_swi

test/arm/test_logic.rb

@@ -82,7 +82,7 @@ module Arm
     end
     def test_too_big_add
       code = @machine.add	 :r1 , :r1, 0x222
-      Risc::Position.set(0,0)
+      Risc::Position.set(code,0,1)
       # add 0x02 (first instruction) and then 0x220 shifted
       assert_code code , :add , [0x02,0x1c,0x91,0xe2] #e2 91 1e 02
       # added extra instruction to add "extra"