API C CurrencyInfo.SetCurrencyUnused

Marks a currency as unused in the currency tab.
 C_CurrencyInfo.SetCurrencyUnused(index, unused)
==Arguments==
:;index:
:;unused:
==Details==
* When a currency is marked as unused, it is is placed under the "Unused" header in the currency list; this is always the last header in the list. This alters the currency's index in the currency list.
* The isTypeUnused return value of () can be used to get the current state.
==Patch changes==