[gnome-shell] st-theme-node: Fix memory leak

[Jasper St. Pierre <jstpierre src gnome org>]

commit f2cbddc19654f7910be0dc2e504af3f0d871ff8f
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Sun Dec 18 23:34:00 2011 -0500

    st-theme-node: Fix memory leak
    
    We ref the icon_colors in st_theme_node_get_icon_colors, but never
    unref it.

 src/st/st-theme-node.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/src/st/st-theme-node.c b/src/st/st-theme-node.c
index 79ec931..cc51498 100644
--- a/src/st/st-theme-node.c
+++ b/src/st/st-theme-node.c
@@ -90,6 +90,12 @@ st_theme_node_dispose (GObject *gobject)
       node->border_image = NULL;
     }
 
+  if (node->icon_colors)
+    {
+      st_icon_colors_unref (node->icon_colors);
+      node->icon_colors = NULL;
+    }
+
   G_OBJECT_CLASS (st_theme_node_parent_class)->dispose (gobject);
 }