[gtk+] checkmenuitem: Fix indicator state

[Matthias Clasen <matthiasc src gnome org>]

commit 333b52bc14b428abdb568c6d0311902c3de51bbf
Author: Timm Bäder <mail baedert org>
Date:   Sat Jun 24 07:47:55 2017 +0200

    checkmenuitem: Fix indicator state
    
    We need to remove the inconsistent and checked state first so we
    actually remove it.

 gtk/gtkcheckmenuitem.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkcheckmenuitem.c b/gtk/gtkcheckmenuitem.c
index 7f1d2fd..24dd548 100644
--- a/gtk/gtkcheckmenuitem.c
+++ b/gtk/gtkcheckmenuitem.c
@@ -359,6 +359,7 @@ update_node_state (GtkCheckMenuItem *check_menu_item)
   GtkStateFlags state;
 
   state = gtk_widget_get_state_flags (GTK_WIDGET (check_menu_item));
+  state &= ~(GTK_STATE_FLAG_CHECKED | GTK_STATE_FLAG_INCONSISTENT);
 
   if (priv->inconsistent)
     state |= GTK_STATE_FLAG_INCONSISTENT;