made getty record the basepid properly

service/getty.lua

@@ -55,10 +55,10 @@ local function allocate()
 end
 
 function start()
+basepid = os.spawn(function()
 scan()
 allocate()
 dprint("screens ready")
-basepid = os.spawn(function()
 while true do
  coroutine.yield()
  for k,v in pairs(pids) do