“Justin And The Knights Of Valour” surprised me. I was expecting a dreary, underdeveloped euro-animation in the turgid tradition of “Freddie As F.R.O.7.” or “Sammy’s Great Escape” but it’s not. Don’t get me wrong, there’s nothing here that will unduly trouble Pixar and DreamWorks. Well, apart from the fact it was made for about a ..