[luabind] [Patch] Null pointer return support

[Georgi C. <go...@ma...>]

Hello,

I have written an enhancement to luabind which allows for returning nil 
from LUA to C++. If C++ expects a pointer (raw or smart) as a result of 
the function, it will receive NULL (or smart_pointer(NULL)) rather than 
get a cast_exception.

The patch is against luabind-0.9. It would be great if you would 
consider integrating it in future releases.

(Please include me in any replies because I am not subscribed to the list.)

Best,

Georgi Chulkov
Masthead Studios