Userdata destructors, missing Lua state argument?

[petrihakkinen]

Is it deliberate that destructors registered with lua_newuserdatadtor does not receive lua_State as argument?
lua_newuserdatadtor(lua_State* L, size_t sz, void (*dtor)(void*));

Note that the tagged API lua_setuserdatadtor() has that argument:
lua_setuserdatadtor(lua_State* L, int tag, void (*dtor)(lua_State*, void*))

This is causing me problems because in the destructor I'd need to clean up data I've stashed in the registry. I eventually want to refactor everything to use tagged userdata, but that is a bigger task.

[petrihakkinen]

I added the missing argument locally and I'm not seeing any negative effects. Here's a pull request which adds the missing argument: #510