known encodings so that message catalogs written in
these encodings can be loaded. I did't find the code
where I can specify that GB2312 is actually the same
as the Windows code page.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@17627 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775