Fix #1752: Account with no balances crashes the GUI
Fix #1752: Account with no balances crashes the GUI

bitshares/bitshares-ui,BitSharesEurope/graphene-ui-testnet,BitSharesEurope/testnet.bitshares.eu,BitSharesEurope/wallet.bitshares.eu,BitSharesEurope/wallet.bitshares.eu,bitshares/bitshares-2-ui,BitSharesEurope/testnet.bitshares.eu,BitSharesEurope/wallet.bitshares.eu,bitshares/bitshares-ui,bitshares/bitshares-ui,BitSharesEurope/graphene-ui-testnet,bitshares/bitshares-2-ui,BitSharesEurope/graphene-ui-testnet,BitSharesEurope/testnet.bitshares.eu,BitSharesEurope/graphene-ui-testnet,BitSharesEurope/wallet.bitshares.eu,bitshares/bitshares-2-ui,BitSharesEurope/testnet.bitshares.eu,bitshares/bitshares-ui