Fixed more internationalisation hints.

src/xml/XMLWriter.cpp

@@ -345,6 +345,8 @@ void XMLFileWriter::CloseWithoutEndingTags()
    if (!wxFFile::Flush())
    {
       wxFFile::Close();
+      /* i18n-hint: <20>flushing<6E> means writing any remaining queued up changes 
+       * to disk that have not yet been written.*/
       throw new XMLFileWriterException(_("Error Flushing File"));
    }