Fix typo

Change-Id: I0c594c232a3004c83a33f0948593850dd924caad
Reviewed-on: https://gerrit.libreoffice.org/72020Reviewed-by: Julien Nabet <serval2412@yahoo.fr>
Tested-by: Julien Nabet <serval2412@yahoo.fr>

dbaccess/source/ui/browser/dbtreeview.hxx

@@ -44,7 +44,7 @@ namespace dbaui
         virtual ~DBTreeView() override;
         virtual void dispose() override;
 
-        /** sets a handler which is called when an list box entry is to be expanded.
+        /** sets a handler which is called when a list box entry is to be expanded.
             <p>When calling the link, the parameter is an SvTreeListEntry marking the entry to be expanded.
             </p>
         */