Does this give you a reason to like Cheney?

[Ghoulish Delight]

As I read a more detailed definition, one thing does stick out...

The cases of manslaughter may be classed as follows those which take place in consequence of: 1. Provocation. 2. Mutual combat. 3. Resistance to public officers, etc. 4. Killing in the prosecution of an unlawful or wanton act. 5. Killing in the prosecution of a lawful act, improperly performed, or performed without lawful authority.

One might make the argument that his lack of hunting license might tread into the "without lawful authority" territory, but it seems unlikely that a proceduraly mistake will translate to criminal prosocution. The rest of that definition ("improperly performed" being key) certainly keeps him safely on the side of the law.