Fix NullReferenceException in DecompilerSettings.Clone

ICSharpCode.Decompiler/DecompilerSettings.cs

@@ -304,6 +304,7 @@ namespace ICSharpCode.Decompiler
 		public DecompilerSettings Clone()
 		{
 			DecompilerSettings settings = (DecompilerSettings)MemberwiseClone();
+			if (csharpFormattingOptions != null)
 				settings.csharpFormattingOptions = csharpFormattingOptions.Clone();
 			settings.PropertyChanged = null;
 			return settings;