java.net.IDN toASCII wrong results

Hello!

``` java
(lldb) po JavaNetIDN_toASCIIWithNSString_(@"test.com")
test.com-

(lldb) po JavaNetIDN_toASCIIWithNSString_(@"")

(lldb) po JavaNetIDN_toASCIIWithNSString_(@"1")
1-

(lldb) po JavaNetIDN_toASCIIWithNSString_(@"test.com/index.php?test")
test.com/index.php?test-
```

JavaNetIDN_toASCIIWithNSString() method always return string with appended '-' char.

On the other hand, when I use this method from java:

``` java
System.out.println(IDN.toASCII("test.com"));
```

I'm getting 'test.com' result.