[PATCH] ws2_32/sock: WSARecv/WSASend checks async pendings of the socket.

Hi, My name is Dongwan Kim. 

I found the misbehavior of WSARecv/WSASend when they are called multiple 
times for overlapped I/O to the same socket .

Specifically, the problem occurs if WSARecv is called when overlapped 
I/O gets ready. WSARecv intercepts the message from the socket. 

for example,

Alice                                              Bob 
WSARecv( SOCKET_A, buffer1 ) ;        <-----         X
...                                   <-----         Y
WSARecv(SOCKET_A, buffer2) ; 

Bob sent messages( X , Y ) to Alice. Alice should get X to buffer1, Y to 
buffer 2 respectively. 

But, In the current version of wine , Alice could get Y to buffer 1 
because WSARecv always tries to get message from the socket without 
checking if there are waiting syncs. 

I attached my solution and the programs for testing.

The test server program receives messages from client with WSARecv. you 
can run it as :  test_server.exe  9088
9088 is port number which is hard-coded in test client program...

The test client program sends fragments of a file to server. you can run 
it as : test_client.exe localhost [file_to_send]
I tested with a 96MB file.

The programs are not clean...

If you need, I can send the source code.

Thanks.

Best Regards.