[ios] Fixed crash in background on fetch completion handler duplicate call.
[ios] Fixed crash in background on fetch completion handler duplicate call.

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