[gtk+] gsk: Plug leak in GskRenderNode

[Emmanuele Bassi <ebassi src gnome org>]

commit d3f88adab72c685ae66bc11aebb4b6c2ed248d0a
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Oct 18 16:34:03 2016 +0100

    gsk: Plug leak in GskRenderNode
    
    We need to destroy the node's surface when finalizing it.

 gsk/gskrendernode.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gsk/gskrendernode.c b/gsk/gskrendernode.c
index a1105e3..9006221 100644
--- a/gsk/gskrendernode.c
+++ b/gsk/gskrendernode.c
@@ -146,6 +146,8 @@ gsk_render_node_finalize (GskRenderNode *self)
 
   self->is_mutable = TRUE;
 
+  g_clear_pointer (&self->surface, cairo_surface_destroy);
+
   gsk_render_node_iter_init (&iter, self);
   while (gsk_render_node_iter_next (&iter, NULL))
     gsk_render_node_iter_remove (&iter);