[ros-dev] about commit 25758 is wrong

[Saveliy Tretiakov]

James Tabor пишет:
> Remember this is a multi-threaded thingy too. If we unload a keyboard, it will
> need to sweep all the threads under that winstation. I think the current thread
> holds the winstation. So,, it would be easy to sweep for a specific group of
> threads.
>
>   

In windows, when one thread unloads layout used by other threads, it is 
not removed from system and can be still used.
It only gets marked as unloaded and dissapears from 
GetKeyboardLayoutList. That's why I added RefCount  to KBL.