[ios] Fixed KVO crash.
[ios] Fixed KVO crash.

dobriy-eeh/omim,Endika/omim,65apps/omim,darina/omim,matsprea/omim,Transtech/omim,gardster/omim,Transtech/omim,trashkalmar/omim,goblinr/omim,rokuz/omim,UdjinM6/omim,dobriy-eeh/omim,edl00k/omim,augmify/omim,andrewshadura/omim,therearesomewhocallmetim/omim,yunikkk/omim,65apps/omim,Zverik/omim,Komzpa/omim,dobriy-eeh/omim,krasin/omim,VladiMihaylenko/omim,guard163/omim,andrewshadura/omim,yunikkk/omim,Komzpa/omim,krasin/omim,mpimenov/omim,Komzpa/omim,felipebetancur/omim,rokuz/omim,milchakov/omim,darina/omim,trashkalmar/omim,vasilenkomike/omim,igrechuhin/omim,dkorolev/omim,simon247/omim,matsprea/omim,edl00k/omim,igrechuhin/omim,milchakov/omim,gardster/omim,vasilenkomike/omim,victorbriz/omim,bykoianko/omim,UdjinM6/omim,krasin/omim,Zverik/omim,alexzatsepin/omim,UdjinM6/omim,felipebetancur/omim,mapsme/omim,bykoianko/omim,felipebetancur/omim,stangls/omim,syershov/omim,edl00k/omim,goblinr/omim,dobriy-eeh/omim,milchakov/omim,stangls/omim,simon247/omim,guard163/omim,igrechuhin/omim,bykoianko/omim,65apps/omim,Endika/omim,dobriy-eeh/omim,guard163/omim,lydonchandra/omim,Zverik/omim,matsprea/omim,kw217/omim,mpimenov/omim,mgsergio/omim,alexzatsepin/omim,darina/omim,albertshift/omim,goblinr/omim,felipebetancur/omim,trashkalmar/omim,simon247/omim,victorbriz/omim,guard163/omim,AlexanderMatveenko/omim,VladiMihaylenko/omim,alexzatsepin/omim,trashkalmar/omim,Volcanoscar/omim,milchakov/omim,VladiMihaylenko/omim,Komzpa/omim,lydonchandra/omim,milchakov/omim,VladiMihaylenko/omim,Volcanoscar/omim,krasin/omim,wersoo/omim,programming086/omim,Zverik/omim,Endika/omim,Komzpa/omim,albertshift/omim,Zverik/omim,programming086/omim,VladiMihaylenko/omim,ygorshenin/omim,simon247/omim,darina/omim,rokuz/omim,goblinr/omim,augmify/omim,Endika/omim,darina/omim,andrewshadura/omim,mapsme/omim,vladon/omim,vasilenkomike/omim,alexzatsepin/omim,mapsme/omim,kw217/omim,mapsme/omim,bykoianko/omim,AlexanderMatveenko/omim,albertshift/omim,igrechuhin/omim,kw217/omim,syershov/omim,TimurTarasenko/omim,Komzpa/omim,ygorshenin/omim,Transtech/omim,Endika/omim,kw217/omim,wersoo/omim,Komzpa/omim,vladon/omim,programming086/omim,lydonchandra/omim,guard163/omim,mapsme/omim,VladiMihaylenko/omim,gardster/omim,albertshift/omim,Zverik/omim,ygorshenin/omim,wersoo/omim,vasilenkomike/omim,lydonchandra/omim,darina/omim,rokuz/omim,victorbriz/omim,kw217/omim,sidorov-panda/omim,VladiMihaylenko/omim,stangls/omim,alexzatsepin/omim,65apps/omim,matsprea/omim,vasilenkomike/omim,edl00k/omim,65apps/omim,therearesomewhocallmetim/omim,Komzpa/omim,TimurTarasenko/omim,TimurTarasenko/omim,dobriy-eeh/omim,mpimenov/omim,edl00k/omim,65apps/omim,therearesomewhocallmetim/omim,krasin/omim,lydonchandra/omim,ygorshenin/omim,yunikkk/omim,yunikkk/omim,stangls/omim,rokuz/omim,rokuz/omim,therearesomewhocallmetim/omim,AlexanderMatveenko/omim,darina/omim,andrewshadura/omim,Volcanoscar/omim,AlexanderMatveenko/omim,ygorshenin/omim,milchakov/omim,wersoo/omim,mgsergio/omim,kw217/omim,krasin/omim,alexzatsepin/omim,lydonchandra/omim,bykoianko/omim,dkorolev/omim,dkorolev/omim,jam891/omim,vasilenkomike/omim,albertshift/omim,victorbriz/omim,mapsme/omim,augmify/omim,UdjinM6/omim,dobriy-eeh/omim,wersoo/omim,bykoianko/omim,UdjinM6/omim,therearesomewhocallmetim/omim,mpimenov/omim,mpimenov/omim,dkorolev/omim,AlexanderMatveenko/omim,programming086/omim,mgsergio/omim,simon247/omim,VladiMihaylenko/omim,guard163/omim,bykoianko/omim,therearesomewhocallmetim/omim,augmify/omim,Saicheg/omim,Zverik/omim,mpimenov/omim,programming086/omim,Transtech/omim,dkorolev/omim,darina/omim,vladon/omim,yunikkk/omim,syershov/omim,alexzatsepin/omim,mgsergio/omim,alexzatsepin/omim,syershov/omim,igrechuhin/omim,65apps/omim,mpimenov/omim,AlexanderMatveenko/omim,vladon/omim,wersoo/omim,vasilenkomike/omim,matsprea/omim,Saicheg/omim,goblinr/omim,vladon/omim,Transtech/omim,Zverik/omim,darina/omim,65apps/omim,mapsme/omim,gardster/omim,stangls/omim,felipebetancur/omim,jam891/omim,wersoo/omim,igrechuhin/omim,vng/omim,bykoianko/omim,dkorolev/omim,mapsme/omim,ygorshenin/omim,gardster/omim,milchakov/omim,vng/omim,Zverik/omim,Volcanoscar/omim,mgsergio/omim,trashkalmar/omim,Komzpa/omim,guard163/omim,rokuz/omim,Volcanoscar/omim,syershov/omim,ygorshenin/omim,wersoo/omim,vng/omim,trashkalmar/omim,milchakov/omim,felipebetancur/omim,matsprea/omim,65apps/omim,sidorov-panda/omim,krasin/omim,sidorov-panda/omim,mgsergio/omim,goblinr/omim,Komzpa/omim,bykoianko/omim,goblinr/omim,edl00k/omim,jam891/omim,vladon/omim,yunikkk/omim,guard163/omim,programming086/omim,jam891/omim,65apps/omim,Saicheg/omim,darina/omim,Endika/omim,milchakov/omim,vladon/omim,bykoianko/omim,mpimenov/omim,alexzatsepin/omim,syershov/omim,albertshift/omim,andrewshadura/omim,trashkalmar/omim,Zverik/omim,sidorov-panda/omim,dobriy-eeh/omim,ygorshenin/omim,sidorov-panda/omim,goblinr/omim,jam891/omim,milchakov/omim,Volcanoscar/omim,rokuz/omim,igrechuhin/omim,goblinr/omim,yunikkk/omim,yunikkk/omim,victorbriz/omim,victorbriz/omim,wersoo/omim,jam891/omim,therearesomewhocallmetim/omim,mpimenov/omim,guard163/omim,edl00k/omim,lydonchandra/omim,edl00k/omim,guard163/omim,dkorolev/omim,matsprea/omim,TimurTarasenko/omim,andrewshadura/omim,stangls/omim,simon247/omim,victorbriz/omim,victorbriz/omim,rokuz/omim,augmify/omim,Zverik/omim,TimurTarasenko/omim,VladiMihaylenko/omim,mgsergio/omim,Saicheg/omim,mgsergio/omim,trashkalmar/omim,augmify/omim,mgsergio/omim,goblinr/omim,dkorolev/omim,yunikkk/omim,vladon/omim,krasin/omim,victorbriz/omim,vasilenkomike/omim,stangls/omim,simon247/omim,ygorshenin/omim,Transtech/omim,Saicheg/omim,therearesomewhocallmetim/omim,kw217/omim,gardster/omim,gardster/omim,gardster/omim,mpimenov/omim,AlexanderMatveenko/omim,albertshift/omim,trashkalmar/omim,mpimenov/omim,matsprea/omim,stangls/omim,augmify/omim,VladiMihaylenko/omim,vladon/omim,syershov/omim,Saicheg/omim,dobriy-eeh/omim,TimurTarasenko/omim,vng/omim,stangls/omim,vng/omim,mgsergio/omim,AlexanderMatveenko/omim,Saicheg/omim,mapsme/omim,lydonchandra/omim,vng/omim,edl00k/omim,mapsme/omim,darina/omim,syershov/omim,yunikkk/omim,UdjinM6/omim,kw217/omim,TimurTarasenko/omim,darina/omim,simon247/omim,simon247/omim,alexzatsepin/omim,trashkalmar/omim,Endika/omim,Transtech/omim,igrechuhin/omim,UdjinM6/omim,felipebetancur/omim,programming086/omim,yunikkk/omim,syershov/omim,sidorov-panda/omim,victorbriz/omim,gardster/omim,Zverik/omim,goblinr/omim,vasilenkomike/omim,krasin/omim,edl00k/omim,programming086/omim,sidorov-panda/omim,syershov/omim,kw217/omim,goblinr/omim,VladiMihaylenko/omim,bykoianko/omim,trashkalmar/omim,alexzatsepin/omim,TimurTarasenko/omim,augmify/omim,albertshift/omim,vng/omim,albertshift/omim,VladiMihaylenko/omim,mgsergio/omim,milchakov/omim,Volcanoscar/omim,mapsme/omim,felipebetancur/omim,Transtech/omim,UdjinM6/omim,Endika/omim,stangls/omim,matsprea/omim,stangls/omim,mgsergio/omim,felipebetancur/omim,Transtech/omim,bykoianko/omim,Endika/omim,darina/omim,therearesomewhocallmetim/omim,dobriy-eeh/omim,alexzatsepin/omim,andrewshadura/omim,Saicheg/omim,jam891/omim,rokuz/omim,augmify/omim,bykoianko/omim,mpimenov/omim,albertshift/omim,dobriy-eeh/omim,UdjinM6/omim,gardster/omim,Saicheg/omim,vasilenkomike/omim,felipebetancur/omim,therearesomewhocallmetim/omim,ygorshenin/omim,VladiMihaylenko/omim,sidorov-panda/omim,Transtech/omim,vng/omim,Endika/omim,syershov/omim,ygorshenin/omim,dkorolev/omim,dobriy-eeh/omim,andrewshadura/omim,mapsme/omim,matsprea/omim,AlexanderMatveenko/omim,rokuz/omim,ygorshenin/omim,65apps/omim,rokuz/omim,jam891/omim,Volcanoscar/omim,UdjinM6/omim,AlexanderMatveenko/omim,lydonchandra/omim,kw217/omim,wersoo/omim,milchakov/omim,krasin/omim,andrewshadura/omim,syershov/omim,jam891/omim,dobriy-eeh/omim,programming086/omim,goblinr/omim,alexzatsepin/omim,mapsme/omim,sidorov-panda/omim,jam891/omim,programming086/omim,vng/omim,syershov/omim,Transtech/omim,igrechuhin/omim,mpimenov/omim,milchakov/omim,Volcanoscar/omim,TimurTarasenko/omim,augmify/omim,Volcanoscar/omim,andrewshadura/omim,Transtech/omim,vladon/omim,lydonchandra/omim,Zverik/omim,sidorov-panda/omim,igrechuhin/omim,vng/omim,trashkalmar/omim,rokuz/omim,TimurTarasenko/omim,Saicheg/omim,simon247/omim,dkorolev/omim