[2020] [ID: 142] Negative items

We had a report and save file that demonstrated items in inventory / vaults being negative in certain circumstances (including but not limited to spirit orbs and bottled fairy’s). After a bit of examination I can confirm that the value of the items is truly negative, and it is not a display error. RemoveItem() ensures that any value <= 0 gets turned into noone. At this time I’m unsure as to what could cause this error, and we should keep a lookout for any more reports.