made passwordless login work

modules/applications/login.lua

@@ -4,10 +4,10 @@ function login()
  if #os.users() > 0 then
   repeat
    io.write(net.id.." login: ")
-    un = io.read()
+   un = io.read()
    io.write("Password: ")
-    pw = io.read("*")
-    cc = os.su(un,pw)
+   pw = io.read("*")
+   cc = os.su(un,pw)
   until cc
   return true
  end

modules/base/header.lua

@@ -156,6 +156,7 @@ do -- so local works
  function os.verifyuser(username,pass)
   if sha then
    if ut[username] then
+    if not os.getuattr(username,"hpass") or not os.getuattr(username,"salt") then return true end
     if sha.sha256(pass..ut[username].salt) == ut[username].hpass then
      return true
     end