remove extra instruction and use next instead

was messing with binary writing as the assumption of 1 word writes is
baked in

test/arm/test_logic.rb

@@ -83,10 +83,12 @@ module Arm
     def test_too_big_add
       code = @machine.add	 :r1 , :r1, 0x222
       begin # add 0x02 (first instruction) and then 0x220 shifted
-        assert_code code , :add , [0x02,0x1c,0x91,0xe2,  0x22,0x10,0x91,0xe2] #e2 91 1e 22
+        assert_code code , :add , [0x02,0x1c,0x91,0xe2] #e2 91 1e 02
       rescue Risc::LinkException
         retry
       end
+      # added extra instruction to add "extra"
+      assert_code code.next , :add , [0x22,0x10,0x91,0xe2] #e2 91 10 22
     end
 
     def label pos = 0x22 + 8