Fixed bug "TypeError: Cannot read property 'forEach' of null"

[danielnovy]

I was getting the error below when clicking on a transaction hash. A simple check to certify that traces is not null solved the problem.

/home/dnovy/etherchain-light/routes/tx.js:125
    traces.forEach(function(trace) {
          ^
TypeError: Cannot read property 'forEach' of null
    at /home/dnovy/etherchain-light/routes/tx.js:125:11
    at /home/dnovy/etherchain-light/node_modules/async/dist/async.js:421:16
    at next (/home/dnovy/etherchain-light/node_modules/async/dist/async.js:5302:29)
    at /home/dnovy/etherchain-light/node_modules/async/dist/async.js:906:16
    at /home/dnovy/etherchain-light/routes/tx.js:78:9
    at dispatchError (/home/dnovy/etherchain-light/node_modules/levelup/lib/util.js:22:36)
    at /home/dnovy/etherchain-light/node_modules/levelup/lib/levelup.js:203:14

[peterbitfly]

Thanks for your PR. It looks good to me and can be merged. Do you know why not trace was available for the transaction? This could happen if you start parity without the --tracing=on flag.

[danielnovy]

This could happen if you start parity without the --tracing=on flag

Oh, gotcha! That's probably the reason, I'm not using that flag.