No need for special setup of CECP std::future
No need for special setup of CECP std::future

CECP_Mediator::receive_cecp_command() checks std::future::is_valid()
before trying to get() the result.

MarkZH/Genetic_Chess,MarkZH/Genetic_Chess,MarkZH/Genetic_Chess,MarkZH/Genetic_Chess,MarkZH/Genetic_Chess