[pitivi] Handle unicode when deserializing object factories.

[Edward Hervey <edwardrv src gnome org>]

commit 1afe4445b51b165b252182fb31a84ec9d3b9b75d
Author: Alessandro Decina <alessandro d gmail com>
Date:   Mon Apr 27 21:23:20 2009 +0200

    Handle unicode when deserializing object factories.
    
    Fixes #579410 even more.
---
 pitivi/formatters/etree.py |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/pitivi/formatters/etree.py b/pitivi/formatters/etree.py
index 189cef7..d3971c7 100644
--- a/pitivi/formatters/etree.py
+++ b/pitivi/formatters/etree.py
@@ -159,9 +159,13 @@ class ElementTreeFormatter(Formatter):
 
     def _loadObjectFactory(self, klass, element):
         self.debug("klass:%r, element:%r", klass, element)
-        # FIXME
-        filename = self.validateSourceURI(element.attrib.get("filename", None))
-        if not filename:
+        filename = element.attrib.get("filename", None)
+        if filename is None:
+            return
+        if isinstance(filename, unicode):
+            filename = filename.encode("utf-8")
+        filename = self.validateSourceURI(filename)
+        if filename is None:
             return None
         if issubclass(klass, FileSourceFactory):
             factory = FileSourceFactory(filename)