don't crash is ref is null
don't crash is ref is null

felix-dumit/APAddressBook,Alterplay/APAddressBook,datomnurdin/APAddressBook,adrum/APAddressBook,adrum/APAddressBook,thinkalike-dev/APAddressBook,datomnurdin/APAddressBook,JeanLebrument/APAddressBook,thinkalike-dev/APAddressBook,grachyov/APAddressBook,grachyov/APAddressBook,felix-dumit/APAddressBook,JeanLebrument/APAddressBook,Alterplay/APAddressBook