B2018-126 & B2018-133: Issues with library document usages

PROMS/Volian.Controls.Library/DisplayLibDocs.cs

@@ -66,6 +66,7 @@ namespace Volian.Controls.Library
 		{
 			if (_SelectedLibDoc >= 0)
 			{
+				if (listBoxLibDocs.Items.Count==0 || _SelectedLibDoc > listBoxLibDocs.Items.Count) return;		// B2018-126: if no items in list return also (count==0)
 				if (_SelectedLibDoc > listBoxLibDocs.Items.Count) return;
 				listBoxLibDocs.SelectedIndex = _SelectedLibDoc;
 			}