[crossfire] auto_apply_fix() issue

[Preston Crow]

I'm playing with some map ideas, and I found that if you have a random 
item in a container, it works fine, but if you put that container inside 
something else, the random item isn't processed. I modified 
auto_apply_fix() to pull out the inventory scanning loop and put it in 
it's own function so that it can recurse through inventory objects that 
have inventories of their own.

It works for my use case, but I'm nervous about unintended consequences, 
so I'm not pushing the change unless I get agreement here that it's 
good.  I've attached the patch for review.

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