[Xcb] I can't send XCB_EXPOSE event

[Andrzej Borucki]

I want Invalidate window:
void invalidate()
{
    xcb_expose_event_t invalidate_event;
    invalidate_event.window = window;
    invalidate_event.count = 1;
    invalidate_event.sequence = 0;
    invalidate_event.response_type = XCB_EXPOSE;
    invalidate_event.x = 0;
    invalidate_event.y = 0;
    invalidate_event.width = WIDTH;
    invalidate_event.height = HEIGHT;
    xcb_void_cookie_t evCookie = xcb_send_event_checked(connection, false,
window, XCB_EVENT_MASK_EXPOSURE, (char*)&invalidate_event);
    testCookie(evCookie, connection, "can't send event");
    xcb_flush(connection);
}
static void testCookie(xcb_void_cookie_t cookie,
    xcb_connection_t* connection,
    char* errMessage)
{
    xcb_generic_error_t* error = xcb_request_check(connection, cookie);
    if (error) {
        fprintf(stderr, "ERROR: %s : %" PRIu8 "\n", errMessage,
error->error_code);
        xcb_disconnect(connection);
        exit(-1);
    }
}

testCookie returns me error = 16 = "bad length"
Inimplementation xcb_send_event_checked in xproto.c is
xcb_parts[4].iov_len = 32 * sizeof(char);
but sizeof(xcb_expose_event_t) = 20, I changed
xcb_parts[4].iov_len = sizeof(xcb_expose_event_t)
and xcb_out.length = (sizeof(xcb_out)+sizeof(xcb_expose_event_t))/4;
but still is error 16
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