ecore_mcast_get_next_bin
int cur_bit = ecore_mcast_get_next_bin(o, 0);
for (cur_bin = ecore_mcast_get_next_bin(o, start_bin); cur_bin >= 0;
cur_bin = ecore_mcast_get_next_bin(o, cur_bin + 1)) {
for (bit = ecore_mcast_get_next_bin(o, 0);
bit = ecore_mcast_get_next_bin(o, bit + 1)) {