Comment 2 for bug 894918

A warhead list would be the best way, yes.
I didn't know how to do it back then, I was a little afraid of putting Warhead pointers into a number array, now I know it's no problem at all.

Keeping http://bugs.renegadeprojects.com/view.php?id=244 in mind, I would say units immune to a warhead should not be targetable by it.