ws2_32/test: Don't test unsupported IP_MULTICAST_TTL on NT4.

dlls/ws2_32/tests/sock.c

@@ -1380,6 +1380,10 @@ todo_wine
     s = socket(AF_INET, SOCK_DGRAM, 0);
     ok(s != INVALID_SOCKET, "Failed to create socket\n");
     size = sizeof(i);
+    i = 0x0000000a;
+    err = setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, (char *) &i, size);
+    if (!err)
+    {
         for (i = 0; i < 4; i++)
         {
             int k, j;
@@ -1391,6 +1395,9 @@ todo_wine
             j = i != 3 ? tests[i] & ((1 << (i + 1) * 8) - 1) : tests[i];
             ok(k == j, "Test [%d] Expected 0x%x, got 0x%x\n", i, j, k);
         }
+    }
+    else
+        win_skip("IP_MULTICAST_TTL is unsupported\n");
     closesocket(s);
 
     /* test SO_PROTOCOL_INFOA invalid parameters */