Lua mana potion

[Amanek]

local exhaust = createConditionObject(CONDITION_EXHAUST)
setConditionParam(exhaust, CONDITION_PARAM_TICKS, (getConfigInfo('timeBetweenExActions') - 1200))
 
function onUse(cid, item, fromPosition, itemEx, toPosition)
	local level = getPlayerLevel(cid)
	local mlevel = getPlayerMagLevel(cid)
	local mana_minimum = (level * 3.5) - 50
	local mana_maximum = (level * 3.7)
	local mana_add = math.random(mana_minimum, mana_maximum)
 
 
	if((not(isSorcerer(itemEx.uid) or isDruid(itemEx.uid)) or getPlayerLevel(itemEx.uid) < 1) and getPlayerCustomFlagValue(itemEx.uid, PlayerCustomFlag_GamemasterPrivileges) == FALSE) then
		doCreatureSay(itemEx.uid, "Only sorcerer and druid of level 1 or above may drink this fluid.", TALKTYPE_ORANGE_1)
		return TRUE
	end
 
	doPlayerAddMana(cid, mana_add)
	doSendMagicEffect(getThingPos(itemEx.uid), CONST_ME_MAGIC_BLUE)
	doCreatureSay(itemEx.uid, "Aaaah...", TALKTYPE_ORANGE_1)
	return TRUE
end

here's problem

getPlayerCustomFlagValue(itemEx.uid, PlayerCustomFlag_GamemasterPrivileges) == FALSE

What do that line of code?

 

[tetra20]

local exhaust = createConditionObject(CONDITION_EXHAUST)
setConditionParam(exhaust, CONDITION_PARAM_TICKS, (getConfigInfo('timeBetweenExActions') - 1200))
 
function onUse(cid, item, fromPosition, itemEx, toPosition)
	local level = getPlayerLevel(cid)
	local mlevel = getPlayerMagLevel(cid)
	local mana_minimum = (level * 3.5) - 50
	local mana_maximum = (level * 3.7)
	local mana_add = math.random(mana_minimum, mana_maximum)
        local voc = {1,2,5,6}
 
 
	if((not inArray(cid, getPlayerVocation(cid)) or getPlayerLevel(itemEx.uid) < 1)) then
		doCreatureSay(cid, "Only sorcerer and druid of level 1 or above may drink this fluid.", TALKTYPE_ORANGE_1)
		return TRUE
	end
 
	doPlayerAddMana(cid, mana_add)
	doSendMagicEffect(getPlayerPosition(cid), CONST_ME_MAGIC_BLUE)
		doCreatureSay(cid, "Aaaah...", TALKTYPE_ORANGE_1)
	return TRUE
end