util/qemu-sockets: Replace the call to close a socket with closesocket()

close() is a *nix function. It works on any file descriptor, and
sockets in *nix are an example of a file descriptor.

closesocket() is a Windows-specific function, which works only
specifically with sockets. Sockets on Windows do not use *nix-style
file descriptors, and socket() returns a handle to a kernel object
instead, so it must be closed with closesocket().

In QEMU there is already a logic to handle such platform difference
in os-posix.h and os-win32.h, that:

  * closesocket maps to close on POSIX
  * closesocket maps to a wrapper that calls the real closesocket()
    on Windows

Replace the call to close a socket with closesocket() instead.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

util/qemu-sockets.c

@@ -487,7 +487,7 @@ int inet_connect_saddr(InetSocketAddress *saddr, Error **errp)
 
         if (ret < 0) {
             error_setg_errno(errp, errno, "Unable to set KEEPALIVE");
-            close(sock);
+            closesocket(sock);
             return -1;
         }
     }
@@ -1050,7 +1050,7 @@ static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp)
     return sock;
 
  err:
-    close(sock);
+    closesocket(sock);
     return -1;
 }