Fix bugs in the magic skill plugin.

data/plugins/cmd-teleport/teleport.rb

@@ -7,7 +7,7 @@ end
 
 on :command, :tele, RIGHTS_ADMIN do |player, command|
   args = command.arguments
-  unless (2..3).include? args.length
+  unless (2..3).include?(args.length)
     player.send_message("Invalid syntax - ::tele [x] [y] [optional-z]")
     return
   end
@@ -16,5 +16,5 @@ on :command, :tele, RIGHTS_ADMIN do |player, command|
   y = args[1].to_i
   z = args.length == 3 ? args[2].to_i : player.position.height
 
-  player.teleport Position.new(x, y, z)
+  player.teleport Position.new(x, y, z) if (0..4).include?(z)
 end