[gtksourceview] buffer: fix a memory leak in get_context_classes_at_iter()

[Sébastien Wilmet <swilmet src gnome org>]

commit 79de404468f98231bb685ca14a8c1bd5bbe36fde
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Fri Aug 16 22:38:09 2013 +0200

    buffer: fix a memory leak in get_context_classes_at_iter()

 gtksourceview/gtksourcebuffer.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtksourceview/gtksourcebuffer.c b/gtksourceview/gtksourcebuffer.c
index 1e993e9..d307764 100644
--- a/gtksourceview/gtksourcebuffer.c
+++ b/gtksourceview/gtksourcebuffer.c
@@ -2540,6 +2540,8 @@ gtk_source_buffer_get_context_classes_at_iter (GtkSourceBuffer   *buffer,
                }
        }
 
+       g_slist_free (tags);
+
        g_ptr_array_add (ret, NULL);
        return (gchar **) g_ptr_array_free (ret, FALSE);
 }