Is there a macro that will allow me to re-summon a pet if there is not one, but do nothing if there already is one present? I have 3 locks in my holy trinity DPS squad, and when I lose one pet, I have to resummon that pet manually, whereas when I lose them all, or just rez, etc I have a macro that summons them all (2 voidwalkers and an imp currently at lvl 22)