properly fix nanosleep in watchdog

src/core/task.c

@@ -1034,7 +1034,7 @@ static void *watchdog_func(void *foo STARPU_ATTRIBUTE_UNUSED)
 		watchdog_ok = 0;
 		STARPU_PTHREAD_MUTEX_UNLOCK(&submitted_mutex);
 
-		req = ts
+		req = ts;
 		while (nanosleep(&req, &rem))
 			req = rem;