Bug: NWNX_Creature_SetSpecialAbility about unified HOT 6 CLOSED

#include "nwnx_creature"
void ChangeSpell(object oPC, int nSpellId, int bIsReady=TRUE)
{
    int nIndex = 0;
    SendMessageToPC(GetFirstPC(), "Index:" + IntToString(nIndex) + "Ready" + IntToString(bIsReady));
    struct NWNX_Creature_SpecialAbility spell = NWNX_Creature_GetSpecialAbility(oPC, nIndex);

    SendMessageToPC(GetFirstPC(), "Id:" + IntToString(spell.id) + "Ready" + IntToString(spell.ready) + "Level" + IntToString(spell.level));
    spell.ready = bIsReady;
    spell.id = SPELL_MELFS_ACID_ARROW;
    spell.level=3;
    NWNX_Creature_SetSpecialAbility(oPC, nIndex, spell);

    spell = NWNX_Creature_GetSpecialAbility(oPC, nIndex);

    SendMessageToPC(GetFirstPC(), "Id:" + IntToString(spell.id) + "Ready" + IntToString(spell.ready) + "Level" + IntToString(spell.level));
}

void main()
{
    struct NWNX_Creature_SpecialAbility spell;

    spell.id = SPELL_MAGE_ARMOR;
    spell.level = 2;
    spell.ready = TRUE;

    NWNX_Creature_AddSpecialAbility(GetFirstPC(), spell);
    ChangeSpell(GetFirstPC(), SPELL_MAGE_ARMOR);
}