intiter = TelephoneListPrefPtr->find(TelephoneListIndex);
- if (intiter->first == TelephoneListIndex && intiter->second > 0){
+ if (intiter->first == TelephoneListIndex && intiter->second > 0 &&
+ intiter != TelephoneListPrefPtr->end()){
sliPriority->SetValue(intiter->second);
sliPriority->Enable();