MimeMailParser::getAttachmentStream() should not use $part as reference

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Parse any mail with attachment
2. Use getAttachments() method
3. Try to read headers of retrieved MimeMailParser_attachment object

What is the expected output? What do you see instead?
You should get some headers while you always get none.

What version of the product are you using? On what operating system?
r26


The problem is because $part being passed by reference and gets overwritten 
here: 
http://code.google.com/p/php-mime-mail-parser/source/browse/trunk/MimeMailParser
.class.php#406

In fact $part should never be passed by reference - even in few other methods 
of MimeMailParser class. I can't see any reason for that.

Original issue reported on code.google.com by [email protected] on 26 Feb 2013 at 6:58