How pass/access 2 or more values to var1~4 of sc_start?

[Kavaline]

Guys, how I can pass/access 2 or more values to var1~4 of sc_start? Something with this logic (SC_CUSTOM alread declared and functional, codes in right functions)

short eff_array[] = {SC_CURSE, SC_STUN};
clif->skill_nodamage(src, bl, skill_id, skill_lv,
    sc_start2(src, bl, SC_CUSTOM, 100, 2000, eff_array, skill->get_time(skill_id, skill_lv)));

int i;
for (i = 0; i <= sizeof(sc->data[SC_CUSTOM]->val2); i++) {
    if (sc->data[SC_CUSTOM]->val2[i] == type) return 0; //error here, with 'i'
}