[pitivi] Correctly detect the running version for the about dialog

[Jean-François Fortin Tam <jfft src gnome org>]

commit a7d21670ce2bac8fc4b4e1d4f6f0a6c2756dc322
Author: Jean-François Fortin Tam <nekohayo gmail com>
Date:   Sun Feb 2 23:05:06 2014 -0500

    Correctly detect the running version for the about dialog
    
    The about dialog was not calling the in_devel() function properly,
    and that function did not look into the correct directory either.
    
    Fixes bug #723489

 pitivi/mainwindow.py |    2 +-
 pitivi/utils/misc.py |    5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/pitivi/mainwindow.py b/pitivi/mainwindow.py
index 2ad9fb1..a5ebdb4 100644
--- a/pitivi/mainwindow.py
+++ b/pitivi/mainwindow.py
@@ -671,7 +671,7 @@ class PitiviMainWindow(Gtk.Window, Loggable):
     def _aboutCb(self, unused_action):
         abt = Gtk.AboutDialog()
         abt.set_name(APPNAME)
-        if in_devel:
+        if in_devel():
             abt.set_version(_("Development version"))
         else:
             abt.set_version(pitivi_version)
diff --git a/pitivi/utils/misc.py b/pitivi/utils/misc.py
index 68886ab..a64800e 100644
--- a/pitivi/utils/misc.py
+++ b/pitivi/utils/misc.py
@@ -104,8 +104,9 @@ def in_devel():
     Returns True if the current Pitivi instance is run from a git checkout
     """
     try:
-        # This code is the same as in the configure files
-        root_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+        # This code is similar to configure.py.in, but we go up 3 dir levels
+        _parent = os.path.dirname
+        root_dir = _parent(_parent(_parent(os.path.abspath(__file__))))
         return os.path.exists(os.path.join(root_dir, '.git'))
     except:
         return False