HSL: add alpha model meta-data

diff --git a/extensions/HSL.c b/extensions/HSL.c
index 76d263bda8ede7c207c1e1958830e0c5f35f2140..20cb8b2beedacd9d0040280c9f0447ab4761b7e9 100644 (file)
--- a/extensions/HSL.c
+++ b/extensions/HSL.c
@@ -62,6 +62,7 @@ init (void)
                   babl_component ("saturation"),
                   babl_component ("lightness"),
                   babl_component ("alpha"),
+                  "alpha",
                   NULL);
   babl_model_new ("name", "HSL",
                   babl_component ("hue"),