Method on_process_exit_default_handler

sources/covscript.cpp:148–154

	}

	bool process_context::on_process_exit_default_handler(void *code)
	{
		cleanup_context();
		collect_garbage();
		std::exit(*static_cast<int *>(code));
		return true;
	}

	std::unique_ptr<process_context> process_context::fork()
	{