[gegl] Revert "algs: halve 8bpc LUT size"

[Øyvind Kolås <ok src gnome org>]

commit 6b2e67410f1ca0cb4f93455038b8bfcbe638f556
Author: Øyvind Kolås <pippin gimp org>
Date:   Mon Apr 9 03:57:12 2018 +0200

    Revert "algs: halve 8bpc LUT size"
    
    This reverts accidentally committed be65432a3e680e1f503565e489a0984ad0ac982f.

 gegl/gegl-algorithms.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gegl/gegl-algorithms.c b/gegl/gegl-algorithms.c
index fd008bf..1e1acff 100644
--- a/gegl/gegl-algorithms.c
+++ b/gegl/gegl-algorithms.c
@@ -108,7 +108,7 @@ gegl_downscale_2x2_generic (const Babl *format,
    }
 }
 
-#define LUT_DIVISOR 32
+#define LUT_DIVISOR 16
 
 static uint16_t lut_u8_to_u16[256];
 static float    lut_u8_to_u16f[256];