fix error when address book is null
fix error when address book is null

troggy/unicoisa,ObsidianCryptoVault/copay,hideoussquid/aur-copay,fr34k8/copay,gabrielbazan7/copay,ObsidianCryptoVault/copay,mpolci/copay,hideoussquid/aur-copay,JDonadio/copay,troggy/unicoisa,urv2/wallet,bitchk-wallet/copay,cmgustavo/copay,ajp8164/copay,hideoussquid/aur-copay,JDonadio/copay,msalcala11/copay,gabrielbazan7/copay,mpolci/copay,cobit-wallet/cobit,troggy/colu-copay-wallet,troggy/colu-copay-wallet,tanojaja/copay,bitjson/copay,Bitcoin-com/Wallet,matiu/copay,msalcala11/copay,urv2/wallet,cmgustavo/copay,troggy/colu-copay-wallet,cobit-wallet/cobit,urv2/wallet,tanojaja/copay,mpolci/copay,hideoussquid/aur-copay,cobit-wallet/cobit,ajp8164/copay,cmgustavo/copay,tanojaja/copay,javierbitpay/copay,msalcala11/copay,ajp8164/copay,Kirvx/copay,Groestlcoin/GroestlPay,Groestlcoin/GroestlPay,javierbitpay/copay,janko33bd/copay,Kirvx/copay,JDonadio/copay,Bitcoin-com/Wallet,dabura667/copay,ObsidianCryptoVault/copay,troggy/colu-copay-wallet,javierbitpay/copay,javierbitpay/copay,matiu/copay,troggy/unicoisa,bitjson/copay,dabura667/copay,fr34k8/copay,tanojaja/copay,Groestlcoin/GroestlPay,janko33bd/copay,urv2/wallet,fr34k8/copay,matiu/copay,dabura667/copay,Kirvx/copay,bitchk-wallet/copay,fr34k8/copay,janko33bd/copay,cmgustavo/copay,Bitcoin-com/Wallet,Groestlcoin/GroestlPay,Kirvx/copay,mpolci/copay,bitchk-wallet/copay,ObsidianCryptoVault/copay,gabrielbazan7/copay,Bitcoin-com/Wallet,gabrielbazan7/copay,bitjson/copay,matiu/copay,msalcala11/copay,bitjson/copay,JDonadio/copay,troggy/unicoisa