returns bone index for a name (-1 if pBoneName doesn't exist)
Используется в AddArrow(), DayZInfected::AddArrow(), ManBase::AddArrow(), DayZInfected::GetCenter(), ManBase::GetCenter(), ManBase::GetDrowningWaterLevelCheck(), ManBase::SetDecayEffects(), ManBase::SpawnBreathVaporEffect() и ManBase::SpawnDrowningBubbles().