need LastCast ability LUA function

[thenthelies]

giving 5+ rep to anyone who can hook me up... I had one a long time ago during PQR but lost it =\

looking for a LUA function that would allow me to do something like

if LastCast==(133) then
print('we just cast fireball!')
end

thanks

[Soapbox]

local LastCastSpell = nil;
if CombatLog == nil then
CombatLog = CreateFrame('Frame')
CombatLog:RegisterEvent("COMBAT_LOG_EVENT_UNFILTERED")
	function SuccessfulCast(self, event, ...)
		local eventType, _, sourceGUID, _, _, _, _, _, _, _, spellID = select(2, ...);
		if (event=="COMBAT_LOG_EVENT_UNFILTERED") then
			local playerGUID = UnitGUID("player");
			if eventType == "SPELL_CAST_SUCCESS" and sourceGUID == playerGUID then
				LastCastSpell = spellID;
			end
		end
	end
	CombatLog:SetScript('OnEvent', SuccessfulCast)
	CombatLog = true
end


function LastCast ()
	return LastCastSpell;
end

Call Example:

if LastCast() == (133) then
print('we just cast fireball!');
end