[pitivi] project_: Disconnect callback method when closing project

[Thibault Saunier <tsaunier src gnome org>]

commit ab42419aafd61730f96d79cb9fcd935a21a4334c
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Tue Feb 9 12:34:00 2016 +0100

    project_: Disconnect callback method when closing project
    
    Reviewed-by: Thibault Saunier <tsaunier gnome org>
    Differential Revision: https://phabricator.freedesktop.org/D746

 pitivi/project.py |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)
---
diff --git a/pitivi/project.py b/pitivi/project.py
index 232f58f..f11adaf 100644
--- a/pitivi/project.py
+++ b/pitivi/project.py
@@ -229,7 +229,7 @@ class ProjectManager(GObject.Object, Loggable):
 
         return False
 
-    def _pipelineDied(self, unused_pipeline):
+    def _projectPipelineDiedCb(self, unused_pipeline):
         """
         Show an error dialog telling the user that everything went kaboom.
         """
@@ -327,7 +327,7 @@ class ProjectManager(GObject.Object, Loggable):
             self.emit("new-project-created", self.current_project)
             self.current_project.connect(
                 "project-changed", self._projectChangedCb)
-            self.current_project.pipeline.connect("died", self._pipelineDied)
+            self.current_project.pipeline.connect("died", self._projectPipelineDiedCb)
 
             if is_validate_scenario:
                 self.current_project.setupValidateScenario()
@@ -568,6 +568,10 @@ class ProjectManager(GObject.Object, Loggable):
         except Exception:
             self.debug(
                 "Tried disconnecting signals, but they were not connected")
+        try:
+            self.current_project.pipeline.disconnect_by_function(self._projectPipelineDiedCb)
+        except Exception:
+            self.fixme("Handle better the errors and not get to this point")
         self._cleanBackup(self.current_project.uri)
         self.exitcode = self.current_project.release()
         self.current_project = None
@@ -604,7 +608,7 @@ class ProjectManager(GObject.Object, Loggable):
         self.emit("new-project-created", project)
 
         project.connect("project-changed", self._projectChangedCb)
-        project.pipeline.connect("died", self._pipelineDied)
+        project.pipeline.connect("died", self._projectPipelineDiedCb)
         project.setModificationState(False)
         self.emit("new-project-loaded", self.current_project, emission)
         self.time_loaded = time.time()