Crushers can kill spectators

Self-explanatory.

Pretty sure this has been around forever and may be intentional?

<Cirnya> spectators being crushed by crushers is intentional or not?
<HellHawkX> spectators behing crushed by crushers?
<HellHawkX> what?
<Cirnya> because I know it's been that way for a long time
<JTE> Spectators are still mobjs in 2.0 and 2.1
<JTE> It is intentional
<JTE> sadly.

This is actually better than having your camera spaz out how it used to be.

Well, the main reason I reported it is because it now displays the death message in 2.1, which seems a little confusing.