[babl] base: ass linear bit to rgb and ragaba models

[Øyvind "pippin" Kolås <ok src gnome org>]

commit f02a1ad4c3f9f5704ebd795ed2ef034063e42675
Author: Øyvind Kolås <pippin gimp org>
Date:   Wed Nov 28 02:17:27 2018 +0100

    base: ass linear bit to rgb and ragaba models

 babl/base/model-rgb.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/babl/base/model-rgb.c b/babl/base/model-rgb.c
index 766ed52..ed4c9da 100644
--- a/babl/base/model-rgb.c
+++ b/babl/base/model-rgb.c
@@ -160,6 +160,7 @@ models (void)
     babl_component_from_id (BABL_GREEN),
     babl_component_from_id (BABL_BLUE),
     "rgb",
+    "linear",
     NULL);
 
   babl_model_new (
@@ -169,6 +170,7 @@ models (void)
     babl_component_from_id (BABL_BLUE_MUL_ALPHA),
     babl_component_from_id (BABL_ALPHA),
     "rgb",
+    "linear",
     "premultiplied",
     "alpha",
     NULL);