[gtksourceview] Actually we can use weak pointer

[Paolo Borelli <pborelli src gnome org>]

commit 3a6e6b6fd93b4d7c21296956da6acf32079b87cf
Author: Paolo Borelli <pborelli gnome org>
Date:   Sat Nov 3 21:26:48 2012 +0100

    Actually we can use weak pointer
    
    I didn't see remove_weak_pointer before...

 gtksourceview/gtksourcegutterrenderer.c |   13 ++++---------
 1 files changed, 4 insertions(+), 9 deletions(-)
---
diff --git a/gtksourceview/gtksourcegutterrenderer.c b/gtksourceview/gtksourcegutterrenderer.c
index dafe17d..06f26a0 100644
--- a/gtksourceview/gtksourcegutterrenderer.c
+++ b/gtksourceview/gtksourcegutterrenderer.c
@@ -82,25 +82,20 @@ enum
 	PROP_BACKGROUND_SET
 };
 
-/* we cannot simply use g_object_add_weak_pointer
- * because if the buffer is finalized after the renderer, glib
- * will try to nullify freed memory, so we need to unref first */
 static void
 set_buffer (GtkSourceGutterRenderer *renderer,
             GtkTextBuffer           *buffer)
 {
 	if (renderer->priv->buffer != NULL)
 	{
-		g_object_weak_unref (G_OBJECT (renderer->priv->buffer),
-		                     (GWeakNotify) g_nullify_pointer,
-		                     (gpointer)&renderer->priv->buffer);
+		g_object_remove_weak_pointer (G_OBJECT (renderer->priv->buffer),
+		                              &renderer->priv->buffer);
 	}
 
 	if (buffer != NULL)
 	{
-		g_object_weak_ref (G_OBJECT (buffer),
-			           (GWeakNotify) g_nullify_pointer,
-			           (gpointer)&renderer->priv->buffer);
+		g_object_add_weak_pointer (G_OBJECT (renderer->priv->buffer),
+		                           &renderer->priv->buffer);
 	}
 
 	renderer->priv->buffer = buffer;