[babl] Adjust constants used for sRGB gamma

[Ãyvind KolÃs <ok src gnome org>]

commit 1cec819c3070c21d90eac9a7ab27717499e75239
Author: Ãyvind KolÃs <pippin gimp org>
Date:   Thu Aug 23 10:26:29 2012 +0200

    Adjust constants used for sRGB gamma
    
    Spotted by Elle Stone and clarified by Graeme Gill, now updated to Current IEC
    specification values.

 babl/base/util.h |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/babl/base/util.h b/babl/base/util.h
index edb3105..6888ddc 100644
--- a/babl/base/util.h
+++ b/babl/base/util.h
@@ -60,11 +60,11 @@ static inline double
 linear_to_gamma_2_2 (double value)
 {
 #if 0
-  if (value > 0.0030402477F)
+  if (value > 0.003130804954)
     return 1.055F * pow (value, (1.0F/2.4F)) - 0.055F;
   return 12.92F * value;
 #else
-  if (value > 0.0030402477F)
+  if (value > 0.003130804954)
     return 1.055F * babl_pow_1_24 (value) - 0.055F;
   return 12.92F * value;
 #endif
@@ -74,11 +74,11 @@ static inline double
 gamma_2_2_to_linear (double value)
 {
 #if 0
-  if (value > 0.03928F)
+  if (value > 0.04045F)
     return pow ((value + 0.055F) / 1.055F, 2.4F);
   return value / 12.92F;
 #else
-  if (value > 0.03928F)
+  if (value > 0.04045F)
     return babl_pow_24 ((value + 0.055F) / 1.055F);
   return value / 12.92F;
 #endif