Fix "Kills by Auto-Titan" not registering at all (R2Northstar#817)

This is a quick fix that will redirect the attacker entity to a proper NPC owned by the player.

By default behavior of the game, attackers are always the final entity in the owning hiearchy, which is always a player if owned NPCs kills enemies.

This change properly redirects the code to the correct NPC whenever they have an owning player.

Northstar.CustomServers/mod/scripts/vscripts/mp/_stats.nut

@@ -493,23 +493,32 @@ void function HandleKillStats( entity victim, entity attacker, var damageInfo )
 	// get the player and it's pet titan
 	entity player
 	entity playerPetTitan
-	if ( attacker.IsPlayer() )
+	entity inflictor = DamageInfo_GetInflictor( damageInfo )
+
+	if ( IsValid( inflictor ) )
 	{
-		// the player is just the attacker
-		player = attacker
-		playerPetTitan = player.GetPetTitan()
+		if ( inflictor.IsProjectile() && IsValid( inflictor.GetOwner() ) ) // Attackers are always the final entity in the owning hierarchy, projectile owners though migh be a player's NPC minion (i.e Auto-Titans)
+			attacker = inflictor.GetOwner()
+
+		else if ( inflictor.IsNPC() ) // NPCs are bypassed as Attackers if they are owned by players, instead they become just inflictors
+			attacker = inflictor
 	}
-	else if ( attacker.IsTitan() && IsPetTitan( attacker ) )
+
+	if ( attacker.IsNPC() )
 	{
-		// the attacker is the player's auto titan
+		if ( !attacker.IsTitan() ) // Normal NPCs case
+			return
+
+		if ( !IsPetTitan( attacker ) ) // NPC Titans case
+			return
+
 		player = attacker.GetTitanSoul().GetBossPlayer()
 		playerPetTitan = attacker
 	}
+	else if ( attacker.IsPlayer() ) // Still checks this because worldspawn might be the attacker
+		player = attacker
 	else
-	{
-		// attacker could be something like an NPC, or worldspawn
 		return
-	}
 
 	// check things once, for performance
 	int damageSource = DamageInfo_GetDamageSourceIdentifier( damageInfo )