Purchases an item available from a vendor
See also Merchant functions.
Signature:
BuyMerchantItem(index, quantity)
Arguments:
index- Index of an item in the vendor's listing (between 1 andGetMerchantNumItems()) (number)quantity- Number of items to purchase (between 1 andGetMerchantItemMaxStack(index)) (number)
This function does not prompt the user for confirmation before its results take effect -- that behavior is provided by the default UI, and this function is called from the confirmation dialog