prevent RPC walletpassphrase returned bad answer

[wwwcase]

Correction in rpc.js#51 (in function send)
it was like this:
if (!result.data['error'] && result.data['result'] != undefined)
result.data = result.data.result;
else
result['success'] = false;

became so (walletpassphrase is succes when result.data:{"result":null,"error":null,"id":"curltest"}) :
if (!result.data['error'] && result.data['result'] != undefined)
result.data = result.data.result;
else if (!result.data['error'] && result.data['id'] != undefined)
result['success'] = 'success';
else
result['success'] = false;