* constant.cs (Constant.IsDefaultInitializer): New method.
* class.cs: Updated.
* expression.cs (ArrayCreation.CheckIndices): Add an optimization to don't
re-initialize default values. It saves KBs almost for every assembly.
Thanks Zoltan for the idea.
(ArrayCreation.ResolveInitializers): Renamed from ValidateInitializers.
(ArrayCreation.DoResolve): Resolve only once.
(ArrayCreation.Emit): Emit static initializer only when it is faster.
(ArrayCreation.GetAttributableValue): Cope with optimized values.
svn path=/trunk/mcs/; revision=59040
