Fix freezing on select, if there is no active sockets

[alex-gv]

No description provided.

[alex-gv]

I had freezing on 'select' then I used MinIO C++ client SDK in my service.
It happen not offen, but it's very critical problem.
It's on Linux.

"select() blocks until at least one descriptor from the sets becomes ready. If no descriptor ever becomes ready, the program will hang forever.
According to the specification, if all three sets are empty and timeout is nullptr, select() will wait forever."