Allow golem AI the use of charms

[wobbly]

I find a shield of faith handy on my golem when controlling it, but of course useless when not.

In general for a golem with a shield I have to turn block off until he closes then switch it back on when he's in melee. Not sure how much hassle that would be to automate in the code. It's an issue for enemys with shields too. They tend to stand there blocking while you blast them with a staff. Even against an archer, you can move backwards while they block or use the time to reload. They're usually better off closing & only using block at melee range.