source-dialog: move E_TYPE_SOURCE_LOCAL to GcalSourceDialog::init

src/gcal-source-dialog.c

@@ -379,13 +379,6 @@ select_calendar_file (GtkButton *button,
       if (priv->local_source != NULL)
         g_clear_pointer (&(priv->local_source), g_object_unref);
 
-      /**
-       * Since we cannot guarantee that the
-       * type system registered ESourceLocal,
-       * it must be ensured at least here.
-       */
-      g_type_ensure (E_TYPE_SOURCE_LOCAL);
-
       /**
        * Create the new source and add the needed
        * extensions.
@@ -574,6 +567,13 @@ gcal_source_dialog_class_init (GcalSourceDialogClass *klass)
   GObjectClass *object_class = G_OBJECT_CLASS (klass);
   GtkWidgetClass *widget_class;
 
+  /**
+   * Since we cannot guarantee that the
+   * type system registered ESourceLocal,
+   * it must be ensured at least here.
+   */
+  g_type_ensure (E_TYPE_SOURCE_LOCAL);
+
   object_class->constructed = gcal_source_dialog_constructed;
 
   widget_class = GTK_WIDGET_CLASS (klass);