[babl] tests: make srgb-to-lab-u8 also compile stand-alone

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

commit a5f169b56a3b288fdd5d0f4a824946c392c3096c
Author: Øyvind Kolås <pippin gimp org>
Date:   Fri Nov 16 22:32:10 2018 +0100

    tests: make srgb-to-lab-u8 also compile stand-alone

 tests/hsl.c            | 3 +--
 tests/srgb_to_lab_u8.c | 8 ++++----
 2 files changed, 5 insertions(+), 6 deletions(-)
---
diff --git a/tests/hsl.c b/tests/hsl.c
index 0457c7f..aaa1855 100644
--- a/tests/hsl.c
+++ b/tests/hsl.c
@@ -17,8 +17,7 @@
 
 #include <stdio.h>
 
-#include "config.h"
-#include "babl.h"
+#include <babl/babl.h>
 
 #include "common.inc"
 
diff --git a/tests/srgb_to_lab_u8.c b/tests/srgb_to_lab_u8.c
index 8974660..2b0e6ad 100644
--- a/tests/srgb_to_lab_u8.c
+++ b/tests/srgb_to_lab_u8.c
@@ -16,9 +16,9 @@
  * <https://www.gnu.org/licenses/>.
  */
 
-#include "config.h"
 #include <math.h>
-#include "babl-internal.h"
+#include <babl/babl.h>
+#include <stdio.h>
 
 #define PIXELS       6
 #define TOLERANCE    0
@@ -53,9 +53,9 @@ test (void)
 
   for (i = 0; i < PIXELS * 3; i++)
     {
-      if (abs (destination_buf[i] - reference_buf[i]) > TOLERANCE)
+      if (fabs (destination_buf[i] - reference_buf[i]) > TOLERANCE)
         {
-          babl_log ("%2i (%2i%%3=%i, %2i/3=%i) is %i should be %i",
+          fprintf (stderr, "%2i (%2i%%3=%i, %2i/3=%i) is %i should be %i",
                     i, i, i % 3, i, i / 3, destination_buf[i], reference_buf[i]);
           OK = 0;
         }