Try this:
local storage = {
7363 = 1,
}
function onUse(cid, item, frompos, item2, topos)
if item.uid == 8452 then
if getPlayerStorageValue(cid,storage.7363) == 1 then
doPlayerSendTextMessage(cid,25,"You have found a Glacier Mask.")
doPlayerAddItem(cid,7902,1)...