[gegl] buffer-source: cast GeglBuffer passed to gegl_buffer_signal_connect

[Øyvind Kolås <ok src gnome org>]

commit 792bfb9cab480b69178cde038d00be0f7c912c9c
Author: Øyvind Kolås <pippin gimp org>
Date:   Tue Jul 1 07:10:16 2014 +0200

    buffer-source: cast GeglBuffer passed to gegl_buffer_signal_connect

 operations/common/buffer-source.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/operations/common/buffer-source.c b/operations/common/buffer-source.c
index 7c239ce..68c25dd 100644
--- a/operations/common/buffer-source.c
+++ b/operations/common/buffer-source.c
@@ -106,7 +106,7 @@ my_set_property (GObject  *gobject,
       }
       buffer = G_OBJECT (g_value_get_object (value));
       if (buffer) {
-        p->buffer_changed_handler = gegl_buffer_signal_connect (buffer, "changed", 
G_CALLBACK(buffer_changed), operation);
+        p->buffer_changed_handler = gegl_buffer_signal_connect (GEGL_BUFFER(buffer), "changed", 
G_CALLBACK(buffer_changed), operation);
       }
       break;
     default: