[evolution] Correct packing of Calendar and Tasks preferences section

[Milan Crha <mcrha src gnome org>]

commit c054fe4a04cb085d50434a0ab265301389503428
Author: Milan Crha <mcrha redhat com>
Date:   Wed Apr 8 16:24:09 2015 +0200

    Correct packing of Calendar and Tasks preferences section
    
    It didn't cover whole section space, because of different default
    packing flags for GtkBox and GTKV/HBox widgets.

 modules/calendar/e-calendar-preferences.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/modules/calendar/e-calendar-preferences.c b/modules/calendar/e-calendar-preferences.c
index 19d8735..5034074 100644
--- a/modules/calendar/e-calendar-preferences.c
+++ b/modules/calendar/e-calendar-preferences.c
@@ -930,7 +930,7 @@ calendar_preferences_construct (ECalendarPreferences *prefs,
        target = e_cal_config_target_new_prefs (ec);
        e_config_set_target ((EConfig *) ec, (EConfigTarget *) target);
        toplevel = e_config_create_widget ((EConfig *) ec);
-       gtk_container_add (GTK_CONTAINER (prefs), toplevel);
+       gtk_box_pack_start (GTK_BOX (prefs), toplevel, TRUE, TRUE, 0);
 
        show_config (prefs);
        /* FIXME: weakref? */