Function deltachat::dc_get_next_media

#[no_mangle]
pub unsafe extern "C" fn dc_get_next_media(
    context: *mut dc_context_t,
    msg_id: u32,
    dir: c_int,
    msg_type: c_int,
    or_msg_type2: c_int,
    or_msg_type3: c_int
) -> u32