flattening / merging stream of many empty streams ends with stack overflow

It's quite strange but for some reason flattening stream of many empty streams causes stack overflow:

``` js
var streamer = require('streamer'), Stream = streamer.Stream,
print = streamer.print, take = streamer.take,
repeat = streamer.repeat, flatten = streamer.flatten

print(flatten(take(10240, repeat(Stream.empty))))
```

What's even more strange that flattening same amount of non empty streams does not causes stack overflow:

``` js
var streamer = require('streamer'), Stream = streamer.Stream,
print = streamer.print, take = streamer.take,
repeat = streamer.repeat, flatten = streamer.flatten

print(flatten(take(10240, repeat(Stream.of(1)))))
```