Small fixes for windows

Windows now builds after nomis52's changes.
Yeah, I can see this is going to cause portability problems. :(

Since this is the only place we try to print a pthread_t. I'd take the easy approach and do:

 OLA_FATAL << "Unable to set thread scheduling parameters for thread "
#ifdef _WIN32
                << thread
#else 
      << thread.x
#endif 
      << ": " << strerror(r);