fix pthread misuse. Comparing pthread_t's with == isn not correct.
fix pthread misuse. Comparing pthread_t's with == isn not correct.

mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs