fdo#63539 make SvTreeListBox::Select virtual

SvLBox was merged with SvTreeListBox;
SvLBox had a virtual Select() and some derived classes override it.
E.g. dbaui::DbaIndexList.

Change-Id: I82b3718e72db5d320704e1e2871de86abc686441

include/svtools/treelistbox.hxx

@@ -715,7 +715,7 @@ public:
 
     sal_Bool Expand( SvTreeListEntry* pParent );
     sal_Bool Collapse( SvTreeListEntry* pParent );
-    sal_Bool Select( SvTreeListEntry* pEntry, sal_Bool bSelect=sal_True );
+    virtual sal_Bool Select( SvTreeListEntry* pEntry, sal_Bool bSelect=sal_True );
     sal_uLong SelectChildren( SvTreeListEntry* pParent, sal_Bool bSelect );
     virtual void SelectAll( sal_Bool bSelect, sal_Bool bPaint = sal_True );