Fixed runtime warning on GladeBaseEditor and GladeSignalEditor dispose methods

gladeui/glade-base-editor.c

@@ -308,8 +308,8 @@ static gboolean
 glade_base_editor_get_child_selected (GladeBaseEditor *e, GtkTreeIter *iter)
 {
   GtkTreeSelection *sel =
-      gtk_tree_view_get_selection (GTK_TREE_VIEW (e->priv->treeview));
-  return gtk_tree_selection_get_selected (sel, NULL, iter);
+    gtk_tree_view_get_selection (GTK_TREE_VIEW (e->priv->treeview));
+  return (sel) ? gtk_tree_selection_get_selected (sel, NULL, iter) : FALSE;
 }
 
 /* Forward declaration for glade_base_editor_project_widget_name_changed */

gladeui/glade-signal-editor.c

@@ -714,8 +714,8 @@ glade_signal_editor_dispose (GObject *object)
 {
   GladeSignalEditorPrivate *priv = GLADE_SIGNAL_EDITOR_GET_PRIVATE (object);
 
-  g_object_unref (priv->detail_store);
-  g_object_unref (priv->handler_store);
+  g_clear_object (&priv->detail_store);
+  g_clear_object (&priv->handler_store);
   
   G_OBJECT_CLASS (glade_signal_editor_parent_class)->dispose (object);
 }