source-dialog: Don't use g_autolist

Chaos ensues with it.

src/gcal-source-dialog.c

@@ -2037,7 +2037,7 @@ goa_account_removed_cb (GoaClient *client,
 static void
 setup_context (GcalSourceDialog *self)
 {
-  g_autolist (GoaAccount) accounts = NULL;
+  GList *accounts = NULL;
   GcalManager *manager;
   GoaClient *client;
   GList *l;
@@ -2059,6 +2059,8 @@ setup_context (GcalSourceDialog *self)
   g_signal_connect (manager, "source-added", G_CALLBACK (add_source), self);
   g_signal_connect (manager, "source-removed", G_CALLBACK (remove_source), self);
 
+  g_list_free_full (accounts, g_object_unref);
+
   GCAL_EXIT;
 }