Pet Affinity Fix (maybe)

[cavedude]

Alright, this now works with group spells just fine. The problem is bard songs still hit. Looking at spells.cpp, it looks like Bard spells hit all pets no matter what, it doesn't even check for Pet Affinity. Is this correct? If not, I'll add the check for charmed pets and Pet Affinity. This was also the trouble testing last night, !caster->GetPet()->Charmed() probably did work, since I was only testing with Bard songs not group spells. :I