[PATCH] ws2_32: Ignore a SO_SNDBUF value of 0 on OSX

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?

Full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=44561

Your paranoid android.


=== debian9 (64 bit WoW report) ===

ws2_32:
sock.c:3041: Test failed: Test[1]: expected 2, got 0
sock.c:3041: Test failed: Test[2]: expected 2, got 0
sock.c:3041: Test failed: Test[1]: expected 2, got 0
sock.c:3041: Test failed: Test[2]: expected 2, got 0