Not in that scenario. The man probably became an organ donor because he wanted to help people after he died, not because he wanted to die faster. I shouldn't be able to say "Oh, I can kill this man and use his organs to save other people." and then it's tough luck for him. If he weren't an organ donor, then I would just fix him up and the other ten patients would die, right? Wanting other people to live through your parts doesn't mean you should be killed the moment it becomes convenient.