fix crash when no transactions are present
fix crash when no transactions are present

breadwallet/breadwallet,litecoin-association/LoafWallet,breadwallet/breadwallet,voisine/breadwallet,voisine/breadwallet,samuraisam/breadwallet,litecoin-association/LoafWallet,QuantumExplorer/breadwallet,QuantumExplorer/breadwallet,thrasher-/breadwallet,QuantumExplorer/breadwallet,samuraisam/breadwallet,QuantumExplorer/breadwallet,litecoin-association/LoafWallet,breadwallet/breadwallet,samuraisam/breadwallet,voisine/breadwallet,voisine/breadwallet,litecoin-association/LoafWallet,voisine/breadwallet,thrasher-/breadwallet