help with this function

[ahynoa 15]

Spoiler

struct CPetSystem::OPetAttribute
{
    BYTE    mAttrId;
    int        mAmount;
    bool    mIsApply;
    
    OPetAttribute(const BYTE cAttrId, const int cAmount, const bool cIsApply) : mAttrId(cAttrId), mAmount(cAmount), mIsApply(cIsApply)
    { }
    
    bool operator== (const OPetAttribute& rcPetAttribute)
    {
        return (mAttrId == rcPetAttribute.mAttrId && mAmount == rcPetAttribute.mAmount && mIsApply == rcPetAttribute.mIsApply);
    }
};

 

Spoiler

void CPetSystem::RemoveAttribute(const BYTE cApplyId, const int cAmount)
{
    if (cApplyId > APPLY_NONE && cApplyId < MAX_APPLY_NUM)
    {
        std::auto_ptr<OPetAttribute> pet_attr(M2_NEW OPetAttribute(cApplyId, cAmount, true));
        OPetAttrContainer::iterator attr_pos = std::find(mPetAttributes.begin(), mPetAttributes.end(), pet_attr.get());
        if (attr_pos != mPetAttributes.end())
        {
            m_pkOwner->ApplyPoint(cApplyId, -1*cAmount);
            mPetAttributes.erase(attr_pos);
        }
    }
}

it is assumed that this function must remove an item from the list but I can not get into if (attr_pos != mPetAttributes.end()) and do not delete anything