bug with LexicalParsingEnabled = false

Hi,

Below is the steps to duplicate the bug.

1. Start TestApplication.
2. Open SDI Editor Application.
3. On Properties tab, set Document.LexicalParsingEnabled = false.
4. Select all text in editor, then delete it:

System.IndexOutOfRangeException: Index was outside the bounds of the array.
at System.Text.StringBuilder.get_Chars(Int32 index)
at bm.a(Document A_0, Int32 A_1, TextRange A_2)
at bm.a(DocumentModificationEventArgs A_0)
at ActiproSoftware.SyntaxEditor.SyntaxEditor.d(Object A_0, DocumentModificationEventArgs A_1)
at ActiproSoftware.SyntaxEditor.Document.b(DocumentModificationEventArgs A_0)
at ActiproSoftware.SyntaxEditor.Document.a(DocumentModification A_0, Boolean A_1)
at ActiproSoftware.SyntaxEditor.Document.a(DocumentModificationType A_0, Int32 A_1, Int32 A_2, String A_3, DocumentModificationOptions A_4)
at ActiproSoftware.SyntaxEditor.Document.ReplaceText(DocumentModificationType type, Int32 offset, Int32 length, String text, DocumentModificationOptions options)
at ActiproSoftware.SyntaxEditor.EditorView.a(DocumentModificationType A_0, String A_1, DocumentModificationOptions A_2)
at ActiproSoftware.SyntaxEditor.EditorView.DeleteSelectedText(DocumentModificationType type, DocumentModificationOptions options)
at ActiproSoftware.SyntaxEditor.Commands.DeleteCommand.Execute(EditCommandContext context)
at ActiproSoftware.SyntaxEditor.MacroRecording.a(EditCommand A_0, EditCommandContext A_1)
at ActiproSoftware.SyntaxEditor.EditorView.a(EditCommand A_0, Boolean A_1)
at ActiproSoftware.SyntaxEditor.SyntaxEditor.a(EditorView A_0, Keys A_1, Char A_2, Boolean A_3)
at ActiproSoftware.SyntaxEditor.SyntaxEditor.OnKeyDown(KeyEventArgs e)
at System.Windows.Forms.Control.ProcessKeyEventArgs(Message& m)
at System.Windows.Forms.Control.ProcessKeyMessage(Message& m)
at System.Windows.Forms.Control.WmKeyChar(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at ActiproSoftware.SyntaxEditor.SyntaxEditor.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
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Thanks,
Nik