Fix: Decrement cached berry inventory count when using a berry

[mrnitrate]

When using a berry the cached inventory was not being updated with the new decremented value.

[JoshYuen]

Should probably check to make sure the UseBerry function actually successfully used a berry before decrementing.

[mad-it]

@JoshYuen That is indeed cleaner, but its cached for 30 seconds. So if it was not used correctly, it would only be invalid for 30 sec. But good remark.
Plus this is only for logging seeing as Berry,Count is a local variable.