Ensure unsigned value does not wrap (V547 in issue #6).
Ensure unsigned value does not wrap (V547 in issue #6).

blairmcg/Dolphin,shoshanatech/Dolphin,jgfoster/Dolphin,objectarts/DolphinVM,dolphinsmalltalk/Dolphin,objectarts/Dolphin,jgfoster/Dolphin,dolphinsmalltalk/Dolphin,blairmcg/Dolphin,jgfoster/Dolphin,objectarts/Dolphin,jgfoster/Dolphin,dolphinsmalltalk/DolphinVM,shoshanatech/Dolphin,shoshanatech/Dolphin,objectarts/DolphinVM,dolphinsmalltalk/Dolphin,blairmcg/Dolphin,blairmcg/Dolphin,dolphinsmalltalk/DolphinVM,shoshanatech/Dolphin,dolphinsmalltalk/Dolphin