[gnome-todo] todoist-preferences-panel: fix signal connect for add_button

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit a761b22c2ff7fd4fbd5e419cce61783c23191db2
Author: Rohit Kaushik <kaushikrohit325 gmail com>
Date:   Thu Jun 15 00:43:59 2017 +0530

    todoist-preferences-panel: fix signal connect for add_button
    
    Since, add_account_button_clicked only need the data,
    that is GtdTodoistPreferencesPanel rather than instance
    add_button, it should be g_signal_connect_swapped.
    Currently with just g_signal_connect the callback
    function will not work properly since data won't be
    correctly passed.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=772278

 plugins/todoist/gtd-todoist-preferences-panel.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/plugins/todoist/gtd-todoist-preferences-panel.c b/plugins/todoist/gtd-todoist-preferences-panel.c
index 03d4425..756da54 100644
--- a/plugins/todoist/gtd-todoist-preferences-panel.c
+++ b/plugins/todoist/gtd-todoist-preferences-panel.c
@@ -106,6 +106,8 @@ spawn_goa_with_args (const gchar *action,
 static void
 add_account_button_clicked (GtdTodoistPreferencesPanel *self)
 {
+  g_return_if_fail (GOA_IS_CLIENT (self->client));
+
   spawn_goa_with_args (NULL, NULL);
 }
 
@@ -267,5 +269,5 @@ gtd_todoist_preferences_panel_init (GtdTodoistPreferencesPanel *self)
   gtk_widget_show (label);
   gtk_list_box_set_placeholder (GTK_LIST_BOX (self->accounts_listbox), GTK_WIDGET (label));
 
-  g_signal_connect (self->add_button, "clicked", G_CALLBACK (add_account_button_clicked), self);
+  g_signal_connect_swapped (self->add_button, "clicked", G_CALLBACK (add_account_button_clicked), self);
 }