Content-Type parsing should be case insensitive

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@23293 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/html/htmlpars.cpp

@@ -875,7 +875,7 @@ bool wxMetaTagHandler::HandleTag(const wxHtmlTag& tag)
         tag.GetParam(_T("HTTP-EQUIV")).IsSameAs(_T("Content-Type"), FALSE) &&
         tag.HasParam(_T("CONTENT")))
     {
-        wxString content = tag.GetParam(_T("CONTENT"));
+        wxString content = tag.GetParam(_T("CONTENT")).Lower();
         if (content.Left(19) == _T("text/html; charset="))
         {
             *m_retval = content.Mid(19);