[PATCH v10 0/2] MR2100: ntdll: Do not send data to port 0.

[Jason Beetham (＠beef331)]

On Windows it seems sending to port 0 does nothing and does not error.
Presently sendmsg errors with EINVAL.
This works around it, by checking if it's port 0 then skipping the data.

--
  v10: ntdll: Do not send data to port 0.
       ws2_32/tests: Check if sending to port 0 succeeds.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/2100