[crossfire] NPC recursive bug

[Mark Wedel]

  I agree that adding new static variables may not be the best thing.

  And actually, for the NPC code, making it so it doesn't need them may not be 
so hard (since I think it recursives pretty locally).  OTOH, it may not be so 
easy - I briefly looked at the apply code before formulating my reply, and it 
can recurse, but pretty indirectly, which is probably why it uses a static.

  The advantage of it actually recursing with passed in value is that it 
eliminates any bug where the count isn't being decremented - to start out with, 
you pass in zero when the player is saying something.