Bug Mafia attempts to retrieve yam stinkbomb using mayam calendar when unavailable

[phreddrickk]

> js retrieveItem(Item.get("yam stinkbomb"))

Creating 1 stuffed yam stinkbomb...
You've already used the vessel symbol.
Returned: false

> get _mayamSymbolsUsed

vessel,fur,chair,yam2,lightning,meat,yam3,eyepatch,cheese,yam4,clock,explosion

> js retrievePrice(Item.get("stuffed yam stinkbomb"))

Returned: 0

I'm reasonably confident this is a regression from the past few days; my code looks for the least expensive item in a certain list, and if the stuffed yam stinkbomb is only just now registering as the cheapest it must not always have had a retrievePrice of 0.

Buying one from the mall seems to have changed things--despite mafia accurately recording the mallPrice earlier, actually doing the transaction has updated the retrievePrice up to its proper value (I assume this is more to do with having one in my inventory than it does interacting with the mall)