API IsInventoryItemLocked

Returns whether an inventory item is locked, usually as it awaits pending action.
 isLocked = IsInventoryItemLocked(slotId)
----
;Arguments
:;slotId: - The slot ID used to refer to that slot in the other GetInventory functions.
;Returns
:;isLocked: - 1 if the slot is locked, nil otherwise
----
Notes
* PickupInventoryItem on an empty slot will not lock that slot.
* PickupInventoryItem on the ammo slot will not lock that slot.