Wrong Encoding for values

```
In version 2.11, the line 771 decides whether or not a string is ascii
encoded or not. As it seems this is not working reliably, for only UTF16LE
strings are "decoded" to the requested defaultEncoding.

My workaround/hack for now is to replace line 771 with this:

$retstr = ($asciiEncoding) ? iconv('cp1250', $this->_defaultEncoding,
$retstr) : $this->_encodeUTF16($retstr);

I'm not fully convinced using an hardcoded encoding of cp1250 is a good
idea but it seems to work in my testcase.

```

Original issue reported on code.google.com by `arne.bla...@gmail.com` on 4 Feb 2009 at 10:24

Start by inspecting line 771 in version 2.11 and reproduce the reported behavior with UTF16LE strings and the requested defaultEncoding. Compare that behavior with the reported cp1250 workaround; done means the encoding conversion works reliably without relying on an unverified hardcoded encoding.

Written by the indexing model from the issue text.