[gtk+] cssnode: Don't leak the style cache on destruction



commit e150ea85bb548afdf5724beed6e262fd2d8fa7b3
Author: Benjamin Otte <otte redhat com>
Date:   Mon Jan 18 18:05:53 2016 +0100

    cssnode: Don't leak the style cache on destruction

 gtk/gtkcssnode.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkcssnode.c b/gtk/gtkcssnode.c
index aac0bb3..0a4c510 100644
--- a/gtk/gtkcssnode.c
+++ b/gtk/gtkcssnode.c
@@ -236,6 +236,8 @@ gtk_css_node_dispose (GObject *object)
     }
 
   gtk_css_node_set_invalid (cssnode, FALSE);
+  
+  g_clear_pointer (&cssnode->cache, gtk_css_node_style_cache_unref);
 
   G_OBJECT_CLASS (gtk_css_node_parent_class)->dispose (object);
 }
@@ -314,6 +316,7 @@ lookup_in_global_parent_cache (GtkCssNode                  *node,
   if (parent->cache == NULL)
     return NULL;
 
+  g_assert (node->cache == NULL);
   node->cache = gtk_css_node_style_cache_lookup (parent->cache,
                                                  (GtkCssNodeDeclaration *) decl,
                                                  gtk_css_node_is_first_child (node),


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