[clutter] Add missing "(constructor)" tag to clutter_color_alloc()

[Emmanuele Bassi <ebassi src gnome org>]

commit 19f040829088af957cf47c1cce8d7914cad1a0a5
Author: Kouhei Sutou <kou clear-code com>
Date:   Fri Jan 4 16:12:39 2013 +0900

    Add missing "(constructor)" tag to clutter_color_alloc()
    
    https://bugzilla.gnome.org/show_bug.cgi?id=691114

 clutter/clutter-color.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/clutter/clutter-color.c b/clutter/clutter-color.c
index 03ffce1..dd49ed3 100644
--- a/clutter/clutter-color.c
+++ b/clutter/clutter-color.c
@@ -984,7 +984,7 @@ clutter_color_new (guint8 red,
 }
 
 /**
- * clutter_color_alloc:
+ * clutter_color_alloc: (constructor)
  *
  * Allocates a new, transparent black #ClutterColor.
  *