[gtk+] iconhelper: Invalidate on clear()

[Matthias Clasen <matthiasc src gnome org>]

commit 3bc58d01e37ecb75be7567bb28cc217d2aaaab9b
Author: Benjamin Otte <otte redhat com>
Date:   Thu Apr 14 21:03:27 2016 +0200

    iconhelper: Invalidate on clear()
    
    When clearing the icon helper, we need to invalidate it. Otherwise the
    previous icon keeps lingering along.
    This is not relevant inside gtkiconhelper.c where other code causes the
    invalidation, but happens when external code calls
    _gtk_icon_helper_clear().
    
    https://bugzilla.gnome.org/show_bug.cgi?id=765066

 gtk/gtkiconhelper.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkiconhelper.c b/gtk/gtkiconhelper.c
index 212eef9..b8737e7 100644
--- a/gtk/gtkiconhelper.c
+++ b/gtk/gtkiconhelper.c
@@ -103,6 +103,8 @@ _gtk_icon_helper_clear (GtkIconHelper *self)
   self->priv->def = gtk_image_definition_new_empty ();
 
   self->priv->icon_size = GTK_ICON_SIZE_INVALID;
+
+  gtk_icon_helper_invalidate (self);
 }
 
 static void