added wxVListBox::GetItemRect() (#9711)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@54601 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/vlbox.h

@@ -127,6 +127,8 @@ public:
     // get the background colour of selected cells
     const wxColour& GetSelectionBackground() const { return m_colBgSel; }
 
+    // get the item rect, returns empty rect if the item is not visible
+    wxRect GetItemRect(size_t n) const;
 
     // operations
     // ----------