[clutter] color: Simplify shade() implementation

[Emmanuele Bassi <ebassi src gnome org>]

commit f67aa36e3b7e7435a19902c95d9ff46954d18993
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Thu Sep 6 12:11:31 2012 +0100

    color: Simplify shade() implementation
    
    We can use the CLAMP macro, instead of a bunch of ifs.

 clutter/clutter-color.c |   13 ++-----------
 1 files changed, 2 insertions(+), 11 deletions(-)
---
diff --git a/clutter/clutter-color.c b/clutter/clutter-color.c
index 1f8a11d..03ffce1 100644
--- a/clutter/clutter-color.c
+++ b/clutter/clutter-color.c
@@ -384,17 +384,8 @@ clutter_color_shade (const ClutterColor *color,
   
   clutter_color_to_hls (color, &h, &l, &s);
 
-  l *= factor;
-  if (l > 1.0)
-    l = 1.0;
-  else if (l < 0)
-    l = 0;
-
-  s *= factor;
-  if (s > 1.0)
-    s = 1.0;
-  else if (s < 0)
-    s = 0;
+  l = CLAMP (l * factor, 0.0, 1.0);
+  s = CLAMP (s * factor, 0.0, 1.0);
   
   clutter_color_from_hls (result, h, l, s);