[pitivi] loggable: Fix the getFileLine return value when there is an error

[Thibault Saunier <tsaunier src gnome org>]

commit 508253e44d66b060ac94709f65064ec45b2b7351
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Wed Jan 29 15:02:14 2014 +0100

    loggable: Fix the getFileLine return value when there is an error

 pitivi/utils/loggable.py |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/pitivi/utils/loggable.py b/pitivi/utils/loggable.py
index 82c82c9..1569e42 100644
--- a/pitivi/utils/loggable.py
+++ b/pitivi/utils/loggable.py
@@ -427,8 +427,8 @@ def getFileLine(where=-1):
     @param where: how many frames to go back up, or function
     @type  where: int (negative) or function
 
-    @return: tuple of (file, line)
-    @rtype:  tuple of (str, int)
+    @return: tuple of (file, line, function_name)
+    @rtype:  tuple of (str, int, str)
     """
     co = None
     lineno = None
@@ -458,7 +458,7 @@ def getFileLine(where=-1):
             stackFrame = stackFrame.f_back
 
     if not co:
-        return "<unknown file>", 0
+        return "<unknown file>", 0, None
 
     return scrubFilename(co.co_filename), lineno, name