[evolution] Fix an EShell reference leak.

[Matthew Barnes <mbarnes src gnome org>]

commit c8be2c5fe1a1dc943bc293bb269da116a7f237ad
Author: Matthew Barnes <mbarnes redhat com>
Date:   Fri Mar 25 10:53:54 2011 -0400

    Fix an EShell reference leak.
    
    GApplication calls g_main_loop_quit() immediately when the last window
    is destroyed, whereas we do it from an idle callback with an extra ref
    on EShell to keep it alive until the idle callback runs.  But because
    GApplication beats us to the punch, our idle callback never runs and
    the EShell reference leaks.
    
    For now, we'll just disable the quit_mainloop() method of GApplication.
    If GtkApplication grows a signal equivalent to EShell::window-destroyed,
    EShell could drop its window_destroyed() method and let G[tk]Application
    handle things normally.

 shell/e-shell.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/shell/e-shell.c b/shell/e-shell.c
index d9dcb5d..d7ecf69 100644
--- a/shell/e-shell.c
+++ b/shell/e-shell.c
@@ -834,6 +834,14 @@ shell_open (GApplication *application,
 }
 
 static void
+shell_quit_mainloop (GApplication *application)
+{
+	/* XXX Don't allow GApplication to quit the main loop.
+	 *     We'll do that ourselves until GtkApplication gets
+	 *     a signal equivalent to EShell::window-destroyed. */
+}
+
+static void
 shell_window_destroyed (EShell *shell)
 {
 	if (e_shell_get_watched_windows (shell) == NULL)
@@ -871,6 +879,7 @@ e_shell_class_init (EShellClass *class)
 	application_class->startup = shell_startup;
 	application_class->activate = shell_activate;
 	application_class->open = shell_open;
+	application_class->quit_mainloop =  shell_quit_mainloop;
 
 	class->window_destroyed = shell_window_destroyed;