more checks for watch os version

tdnet/td/net/Wget.cpp

@@ -74,6 +74,9 @@ Status Wget::try_init() {
   TRY_STATUS(addr.init_host_port(url.host_, url.port_, prefer_ipv6_));
 
   TRY_RESULT(fd, SocketFd::open(addr));
+  if (fd.empty()) {
+    return td::Status::Error("Sockets are not supported");
+  }
   if (url.protocol_ == HttpUrl::Protocol::Http) {
     connection_ = create_actor<HttpOutboundConnection>("Connect", std::move(fd), SslStream{},
                                                        std::numeric_limits<std::size_t>::max(), 0, 0,

tdutils/td/utils/port/SocketFd.cpp

@@ -629,29 +629,36 @@ bool SocketFd::empty() const {
 }
 
 PollableFdInfo &SocketFd::get_poll_info() {
+  CHECK(!empty());
   return impl_->get_poll_info();
 }
 const PollableFdInfo &SocketFd::get_poll_info() const {
+  CHECK(!empty());
   return impl_->get_poll_info();
 }
 
 const NativeFd &SocketFd::get_native_fd() const {
+  CHECK(!empty());
   return impl_->get_native_fd();
 }
 
 Status SocketFd::get_pending_error() {
+  CHECK(!empty());
   return impl_->get_pending_error();
 }
 
 Result<size_t> SocketFd::write(Slice slice) {
+  CHECK(!empty());
   return impl_->write(slice);
 }
 
 Result<size_t> SocketFd::writev(Span<IoSlice> slices) {
+  CHECK(!empty());
   return impl_->writev(slices);
 }
 
 Result<size_t> SocketFd::read(MutableSlice slice) {
+  CHECK(!empty());
   return impl_->read(slice);
 }