[libdazzle] build: be explicit about casts via g_object_ref()

[Christian Hergert <chergert src gnome org>]

commit b52e00558c356d905e10ed49d4e64ea5d5605e48
Author: Christian Hergert <chergert redhat com>
Date:   Wed Nov 22 00:52:59 2017 -0800

    build: be explicit about casts via g_object_ref()
    
    If pending patches for GObject, these will become a warning.

 src/statemachine/dzl-state-machine-buildable.c |    2 +-
 src/widgets/dzl-list-box.c                     |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/statemachine/dzl-state-machine-buildable.c b/src/statemachine/dzl-state-machine-buildable.c
index 5510be4..8df9280 100644
--- a/src/statemachine/dzl-state-machine-buildable.c
+++ b/src/statemachine/dzl-state-machine-buildable.c
@@ -634,7 +634,7 @@ dzl_state_machine_buildable_custom_tag_start (GtkBuildable  *buildable,
       StatesParserData *parser_data;
 
       parser_data = g_slice_new0 (StatesParserData);
-      parser_data->self = g_object_ref (buildable);
+      parser_data->self = g_object_ref (DZL_STATE_MACHINE (buildable));
       parser_data->builder = g_object_ref (builder);
       parser_data->stack = g_queue_new ();
 
diff --git a/src/widgets/dzl-list-box.c b/src/widgets/dzl-list-box.c
index 8f20633..425a284 100644
--- a/src/widgets/dzl-list-box.c
+++ b/src/widgets/dzl-list-box.c
@@ -77,7 +77,7 @@ _dzl_list_box_cache (DzlListBox    *self,
 
   if (priv->trashed_rows.length < priv->recycle_max)
     {
-      g_autoptr(GtkWidget) held = g_object_ref (row);
+      g_autoptr(GtkWidget) held = g_object_ref (GTK_WIDGET (row));
 
       gtk_list_box_unselect_row (GTK_LIST_BOX (self), GTK_LIST_BOX_ROW (row));
       gtk_container_remove (GTK_CONTAINER (self), GTK_WIDGET (row));