HE'S one of the stars of Australia's biggest soap and she's, well, married to him. Home and Away's Dan Ewing might be the A-lister, but it's his socialite wife Marni that has the gossip mills churning. Confidential understands some colleagues are fed up with demands from the couple, which came to a head on a trip to London this week to film scenes for Home and Away. A Seven network source indicated Ewing wasn't happy with the initial premium economy booking. The entire cast is understood to