BugFixing

local listeners={}
local function waitForListeners(pass)
while true do
event, id,msg=os.pullEvent("rednet_message")
if msg == pass then
rednet.send(id, "Granted")
if not listeners[id] then listeners[id] = true end
elseif msg == "exit" and listeners[id] == true then
listeners[id] = nil
else
rednet.send(id, "Denied")
end
end
end