tests: output with more details when grayscale_to_rgb fails

diff --git a/tests/grayscale_to_rgb.c b/tests/grayscale_to_rgb.c
index 6658f7fcce4aae347144f2fa00aa3526b7f7786b..7da0c86fa70725711ed8867872318ae43bef5cdb 100644 (file)
--- a/tests/grayscale_to_rgb.c
+++ b/tests/grayscale_to_rgb.c
@@ -61,7 +61,8 @@ test (void)
     {
       if (rgb_buf[i] != rgb_buf_ref[i])
         {
-          babl_log ("index %i is problematic", i);
+          babl_log ("index %i is problematic : %f instead of %f",
+                    i, rgb_buf[i], rgb_buf_ref[i]);
           OK = 0;
         }
     }