Function xmlTextWriterWriteVFormatAttributeNS 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn xmlTextWriterWriteVFormatAttributeNS(
    writer: *mut XmlTextWriter,
    prefix: *const xmlChar,
    name: *const xmlChar,
    namespaceURI: *const xmlChar,
    format: *const c_char,
    argptr: *mut VaListTag,
) -> c_int