[evolution-data-server] source_remove_sync: Fail gracefully when given a scratch source.

[Matthew Barnes <mbarnes src gnome org>]

commit a8eb939af5623eeb4b5fe24cfcde022d954f4d17
Author: Matthew Barnes <mbarnes redhat com>
Date:   Tue Feb 19 09:22:46 2013 -0500

    source_remove_sync: Fail gracefully when given a scratch source.
    
    Apparently e_dbus_object_get_source_removable() does not check its
    argument for NULL, and scratch sources have no internal EDBusObject.

 libedataserver/e-source.c |   20 ++++++++++++--------
 1 files changed, 12 insertions(+), 8 deletions(-)
---
diff --git a/libedataserver/e-source.c b/libedataserver/e-source.c
index 9f340f6..f1c33e0 100644
--- a/libedataserver/e-source.c
+++ b/libedataserver/e-source.c
@@ -924,15 +924,19 @@ source_remove_sync (ESource *source,
                     GCancellable *cancellable,
                     GError **error)
 {
-       EDBusObject *dbus_object;
-       EDBusSourceRemovable *dbus_source;
+       EDBusSourceRemovable *dbus_interface = NULL;
+       GDBusObject *dbus_object;
        gboolean success;
 
-       dbus_object = E_DBUS_OBJECT (source->priv->dbus_object);
-
-       dbus_source = e_dbus_object_get_source_removable (dbus_object);
+       dbus_object = e_source_ref_dbus_object (source);
+       if (dbus_object != NULL) {
+               dbus_interface =
+                       e_dbus_object_get_source_removable (
+                       E_DBUS_OBJECT (dbus_object));
+               g_object_unref (dbus_object);
+       }
 
-       if (dbus_source == NULL) {
+       if (dbus_interface == NULL) {
                g_set_error (
                        error, G_IO_ERROR,
                        G_IO_ERROR_PERMISSION_DENIED,
@@ -942,9 +946,9 @@ source_remove_sync (ESource *source,
        }
 
        success = e_dbus_source_removable_call_remove_sync (
-               dbus_source, cancellable, error);
+               dbus_interface, cancellable, error);
 
-       g_object_unref (dbus_source);
+       g_object_unref (dbus_interface);
 
        return success;
 }