[gegl] rectangle.c: fix previous commit

[Massimo Valentini <mvalentini src gnome org>]

commit 4f2f7b71d48cec004cac6d3ec783e85df26551b4
Author: Massimo Valentini <mvalentini src gnome org>
Date:   Sun Oct 13 17:02:33 2013 +0200

    rectangle.c: fix previous commit

 operations/common/rectangle.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/operations/common/rectangle.c b/operations/common/rectangle.c
index bf0a8f0..058163f 100644
--- a/operations/common/rectangle.c
+++ b/operations/common/rectangle.c
@@ -75,7 +75,7 @@ do_setup (GeglOperation *operation)
         gegl_node_set (self->color,
                        "value", o->color,
                        NULL);
-      g_object_unref (self->color);
+      g_object_unref (color);
     }
 
     {