Validate receiving addresses in xtn form

[leto]

Error: Invalid parameter, unknown address format: zzsdfszfasdfasfkajs;dlfkjas;klfja;lskdf
    at /Users/jonathanleto/git/hush-ng/node_modules/bitcoin/lib/jsonrpc.js:130:19
    at Array.forEach (native)
    at IncomingMessage.<anonymous> (/Users/jonathanleto/git/hush-ng/node_modules/bitcoin/lib/jsonrpc.js:127:15)
    at emitNone (events.js:91:20)
    at IncomingMessage.emit (events.js:188:7)
    at endReadableNT (_stream_readable.js:975:12)
    at _combinedTickCallback (internal/process/next_tick.js:80:11)
    at process._tickCallback (internal/process/next_tick.js:104:9)