fix(toLocaleString): make sure we arent calling toLocaleString on null

app/components/Contacts/Network.js

@@ -94,6 +94,7 @@ class Network extends Component {
           <section>
             <h2>My Network</h2>
             <span className={styles.channelAmount}>
+              {btc.satoshisToBtc(balance.channelBalance)}BTC ≈ ${btc.satoshisToUsd(balance.channelBalance, currentTicker.price_usd) ? btc.satoshisToUsd(balance.channelBalance, currentTicker.price_usd).toLocaleString() : ''}
             </span>
           </section>
           <section className={styles.addChannel} onClick={openContactsForm}>

app/components/Wallet/Wallet.js

@@ -32,6 +32,7 @@ class Wallet extends Component {
     } = this.props
 
     const { modalOpen, qrCodeType } = this.state
+    const usdAmount = parseFloat(btc.satoshisToUsd(balance.walletBalance, currentTicker.price_usd)) ? parseFloat(btc.satoshisToUsd(balance.walletBalance, currentTicker.price_usd)).toLocaleString() : ''
 
     const changeQrCode = () => {
       const qrCodeNum = this.state.qrCodeType === 1 ? 2 : 1