[gnome-calendar/calendar-management] manager: fix wrong method call

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

commit ba94d3dc8e227cac4d5f3af3e457ee7ed70b774c
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Fri Feb 6 12:35:26 2015 -0200

    manager: fix wrong method call

 src/gcal-manager.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gcal-manager.c b/src/gcal-manager.c
index 6ff0cdb..3ef637c 100644
--- a/src/gcal-manager.c
+++ b/src/gcal-manager.c
@@ -972,7 +972,7 @@ gcal_manager_remove_source (GcalManager *manager,
    * GcalManager::remove_source will properly setup
    * the signals and subscribers.
    */
-  remove_source (GCAL_MANAGER (user_data), E_SOURCE (source));
+  remove_source (manager, E_SOURCE (source));
 
   e_source_remove (source, NULL, on_source_removed, manager);
 }