HTTP transport looses error if result is provided

[jeromevalentin]

See example below:

CreateInstance()
      .add('foo:1', function (args, done) {
        done(new Error('a failure here'), { BAR: args.bar })
      })
      .listen({type: 'http', port: '18995'})
      .ready(function () {
        var siClient = CreateInstance()
          .client({type: 'http', port: '18995'})

        siClient.act('foo:1,bar:2', function (err, out) {
          // err is null and out contains {BAR: 2}
        })
      })

[rjrodger]

yup - by design