if ((rrdnew.stat_head = calloc(1, sizeof(stat_head_t))) == NULL) {
rrd_set_error("allocating stat_head for new RRD");
rrd_free(&rrdold);
if ((rrdnew.stat_head = calloc(1, sizeof(stat_head_t))) == NULL) {
rrd_set_error("allocating stat_head for new RRD");
rrd_free(&rrdold);