Fix build.

ICSharpCode.Decompiler/Disassembler/MethodBodyDisassembler.cs

@@ -275,7 +275,7 @@ namespace ICSharpCode.Decompiler.Disassembler
 					output.WriteLine("} // end filter");
 					break;
 				default:
-					throw new NotSupportedException();
+					throw new ArgumentOutOfRangeException();
 			}
 		}
 

ICSharpCode.Decompiler/IL/Transforms/TransformArrayInitializers.cs

@@ -337,7 +337,7 @@ namespace ICSharpCode.Decompiler.IL.Transforms
 			if (MatchInitializeArrayCall(body.Instructions[pos], out var method, out var v2, out var field) && array == v2) {
 				if (field.HasFlag(System.Reflection.FieldAttributes.HasFieldRVA)) {
 					var valuesList = new List<ILInstruction>();
-					var initialValue = field.GetInitialValue(context.TypeSystem.ModuleDefinition.Reader);
+					var initialValue = field.GetInitialValue(context.TypeSystem.ModuleDefinition.Reader, context.TypeSystem);
 					if (DecodeArrayInitializer(arrayType, array, initialValue, arrayLength, valuesList)) {
 						values = valuesList.ToArray();
 						foundPos = pos;