[PATCH 3/3] ws2_32: Disallow NULL in socket lookups.

[Akihiro Sagawa]

NULL means an unused slot, not a valid socket.

Signed-off-by: Akihiro Sagawa 
---
 dlls/ws2_32/socket.c | 4 ++++
 1 file changed, 4 insertions(+)

[Zebediah Figura (she/her)]

Signed-off-by: Zebediah Figura

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Although it'd be nice to have a couple tests for this as well.