1. derived wxMSW radio box from static box because it includes the box anyhow

2. changed it to use wxSubwindows to cut down code duplication
3. deprecated Get/SetNumberOfRowsOrCols() which didn't do anything in neither
   MSW nor GTK (this is the only change in GTK code)


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@30980 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/radiocmn.cpp

@@ -134,5 +134,15 @@ int wxRadioBoxBase::GetNextItem(int item, wxDirection dir, long style) const
     return item;
 }
 
+// these functions are deprecated and don't do anything
+int wxRadioBoxBase::GetNumberOfRowsOrCols() const
+{
+    return 1;
+}
+
+void wxRadioBoxBase::SetNumberOfRowsOrCols(int WXUNUSED(n))
+{
+}
+
 #endif // wxUSE_RADIOBOX