[meld] Fix: bgo #753358 stderr errors when Alt-F4 is used

[Kai Willadsen <kaiw src gnome org>]

commit 7682c9d6980d63551553184bbb07152930d61bc9
Author: Zain <zainengineer gmail com>
Date:   Sun Nov 8 12:32:48 2015 +1030

    Fix: bgo #753358 stderr errors when Alt-F4 is used
    
    Problem:
      When meld is launched from console, usecase is git difftool,
      After closing App using Alt+F4 console displays multiple error messages
      Error Messages look like
      (meld:18521): Gtk-CRITICAL **: gtk_container_foreach: assertion 'GTK_IS_CONTAINER (container)' failed
    
    Cause:
      closing window triggers do_window_removed
      Unlike when Quit is choosen from Menu, self.quit() is never called
      Gtk complains and adds error messages on STDERR
    
    Solution:
      When do_window_removed is called check if there are any active windows
      If there is no active window, call self.quit()

 meld/meldapp.py |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/meld/meldapp.py b/meld/meldapp.py
index 8fd11c9..b0e5308 100644
--- a/meld/meldapp.py
+++ b/meld/meldapp.py
@@ -98,6 +98,8 @@ class MeldApp(Gtk.Application):
     def do_window_removed(self, widget):
         widget.meldwindow = None
         Gtk.Application.do_window_removed(self, widget)
+        if not len(self.get_windows()):
+            self.quit()
 
     # We can't override do_local_command_line because it has no introspection
     # annotations: https://bugzilla.gnome.org/show_bug.cgi?id=687912