Method writeNull

MonaServer/sources/ScriptWriter.h:45–45

	void		 writeString(const char* value,Mona::UInt32 size) { start(); lua_pushlstring(_pState,value,size); end(); }
	void		 writeBoolean(bool value) { start(); lua_pushboolean(_pState, value); end(); }
	void		 writeNull() { start(); lua_pushnil(_pState); end(); }
	Mona::UInt64 writeDate(const Mona::Date& date);
	Mona::UInt64 writeBytes(const Mona::UInt8* data,Mona::UInt32 size);