[gegl] gegl: add OpenCL to warnings about failing to initialize LUTs

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

commit e73cddb510f0bd7a01a73b388853fe25d62e600b
Author: Øyvind Kolås <pippin gimp org>
Date:   Wed Feb 19 11:03:40 2020 +0100

    gegl: add OpenCL to warnings about failing to initialize LUTs
    
    To make it clearer what is going on when this is failing, making bug
    like in issue #225 triage easier.

 gegl/opencl/gegl-cl-color.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gegl/opencl/gegl-cl-color.c b/gegl/opencl/gegl-cl-color.c
index f13b94c42..ce0244c9d 100644
--- a/gegl/opencl/gegl-cl-color.c
+++ b/gegl/opencl/gegl-cl-color.c
@@ -185,7 +185,7 @@ gegl_cl_color_compile_kernels (void)
 
   if (!float_kernels)
     {
-      g_warning ("Failed to compile color conversions (float_kernels)");
+      g_warning ("OpenCL Failed to compile color conversions (float_kernels)");
       result = FALSE;
     }
 
@@ -196,7 +196,7 @@ gegl_cl_color_compile_kernels (void)
 
   if (!lut8_kernels)
     {
-      g_warning ("Failed to compile color conversions (lut8_kernels)");
+      g_warning ("OpenCL Failed to compile color conversions (lut8_kernels)");
       result = FALSE;
     }