[cogl] renderer: add missing scope annotation

[Robert Bragg <rbragg src gnome org>]

commit ef26068ad9d4936a5ba679067d0ceec7aaf728f7
Author: Lionel Landwerlin <llandwerlin gmail com>
Date:   Tue Sep 3 20:52:51 2013 +0100

    renderer: add missing scope annotation
    
    Reviewed-by: Robert Bragg <robert linux intel com>
    
    (cherry picked from commit 2008493a46a045eabc3b2db330ac980a08ed710e)

 cogl/cogl-renderer.h |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/cogl/cogl-renderer.h b/cogl/cogl-renderer.h
index b98c756..aca63b8 100644
--- a/cogl/cogl-renderer.h
+++ b/cogl/cogl-renderer.h
@@ -406,7 +406,8 @@ typedef void (*CoglOutputCallback) (CoglOutput *output, void *user_data);
 /**
  * cogl_renderer_foreach_output:
  * @renderer: A connected #CoglRenderer
- * @callback: A #CoglOutputCallback to be called for each display output
+ * @callback: (scope call): A #CoglOutputCallback to be called for
+ *            each display output
  * @user_data: A user pointer to be passed to @callback
  *
  * Iterates all known display outputs for the given @renderer and