(!1639) xwayland: drop swapping request length fields

The request struct's length fields aren't used anymore - we have the
client->req_len field instead, which also is bigreq-compatible.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>

hw/xwayland/xwayland.c

@@ -378,8 +378,6 @@ static int _X_COLD
 SProcXwlQueryVersion(ClientPtr client)
 {
     REQUEST(xXwlQueryVersionReq);
-
-    swaps(&stuff->length);
     REQUEST_AT_LEAST_SIZE(xXwlQueryVersionReq);
     swaps(&stuff->majorVersion);
     swaps(&stuff->minorVersion);