Eddie Howe believes that Newcastle United’s £39million decision has now been justified after Saturday. The Magpies were held to a 4-4 draw by Luton Town, but there was a special moment for Harvey Barnes. He made his first appearance since September, after finally recovering from a foot injury. It was a surprisingly long absence, but Barnes marked his comeback with a goal. It was an excellent one too, caressing the ball beyond Thomas Kaminski in front of the Gallowgate to make it 4-4. The 26-year-old now has two goals for Newcastle United this season, both of which have come at that end of St J…