webservices/tests: Add a missing closesocket call (Coverity).

Signed-off-by: Sven Baars <sven.wine@gmail.com>
Signed-off-by: Hans Leidekker <hans@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dlls/webservices/tests/proxy.c

@@ -708,6 +708,7 @@ static DWORD CALLBACK server_proc( void *arg )
         closesocket( c );
         if (quit) break;
     }
+    closesocket( s );
 
     return 0;
 }