Crash on saving results because of null bytes

[ghost]

@@@
Application Identifier: com.hardcoded_software.dupeguru
Application Version: 2.10.0

Traceback (most recent call last):
File "core/app_cocoa_inter.pyc", line 68, in saveResults
File "core/app.pyc", line 327, in save
File "core/results.pyc", line 287, in save_to_xml
File "lxml.etree.pyx", line 634, in lxml.etree._Element.set (src/lxml/lxml.etree.c:33098)
File "apihelpers.pxi", line 488, in lxml.etree._setAttributeValue (src/lxml/lxml.etree.c:14859)
File "apihelpers.pxi", line 1295, in lxml.etree._utf8 (src/lxml/lxml.etree.c:21250)
ValueError: All strings must be XML compatible: Unicode or ASCII, no NULL bytes
@@@

[ghost]

Ok, what happens is that lxml raises that error not only on null bytes, but on any character that is invalid xml (\x19 for example). Because it's possible to have filenames that contain these characters, I have to wrap the set in a try.

[ghost]

(from [26609a3e57af]) [#95 state:fixed] Fixed a crash on results save when it contained invalid characters.
http://bitbucket.org/hsoft/dupeguru/changeset/26609a3e57af/