atomic-penguin/sm-hidden — pull request #33 by daniel-murray (2013-01-06 12:19:41+00:00)
Title: https://github.com/atomic-penguin/sm-hidden/issues/13

http://forums.alliedmods.net/showthread.php?t=99147
based on this plugin
it seems to use a global constant defined as (1<<11)
which we already had defined