rem: ECA_LOG_MSG(ECA_LOGGER::system_objects, "(eca-engine) Signaling exit");
add: ECA_LOG_MSG(ECA_LOGGER::system_objects, "Signaling exit");
context: void ECA_ENGINE::signal_exit(void){  pthread_mutex_lock(&impl_repp->ecasound_exit_mutex_repp);  ECA_LOG_MSG(ECA_LOGGER::system_objects, "(eca-engine) Signaling exit");  pthread_cond_broadcast(&impl_repp->ecasound_exit_cond_repp);  pthread_mutex_unlock(&impl_repp->ecasound_exit_mutex_repp);}