10115 ses topo module needs smatch fixes

@@ -476,12 +476,12 @@
         ses_ct_print("start contract event thread");
         efd = open64(CTFS_ROOT "/device/pbundle", O_RDONLY);
         fds.fd = efd;
         fds.events = POLLIN;
         fds.revents = 0;
-        sigaddset(&sigset, sesthread.thr_sig);
-        pthread_sigmask(SIG_UNBLOCK, &sigset, NULL);
+        (void) sigaddset(&sigset, sesthread.thr_sig);
+        (void) pthread_sigmask(SIG_UNBLOCK, &sigset, NULL);
         for (;;) {
                 /* check if we've been asked to exit */
                 (void) pthread_mutex_lock(&sesthread.mt);
                 if (sesthread.doexit) {
                         (void) pthread_mutex_unlock(&sesthread.mt);