Fix wizard mode issues pointed out by the #wizmakemap fix. If a
shopkeeper or temple priest is on a different level and its home
level gets flipped, monst eshk or epri data became invalid and would
cause trouble if the shk or priest ever made it back to home level.
If a vault guard is maintaining a temporary corridor and the level
gets flipped, the data became invalid. If you used #wizfliplevel
while the guard was leading you out, the corridor spots would be
flipped along with the rest of the map but the guards's temporary
corridor data didn't match. Breaches in the vault walls would be
sealed, then the guard would just mill around, never finishing
leading the hero out.
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