[gegl] buffer: put the "gegl-debug.h" include back in gegl-buffer.c

[Michael Natterer <mitch src gnome org>]

commit 13f66c9ebc95f4e409b58a22fe75277141dca6c8
Author: Michael Natterer <mitch gimp org>
Date:   Thu Feb 1 02:27:02 2018 +0100

    buffer: put the "gegl-debug.h" include back in gegl-buffer.c

 gegl/buffer/gegl-buffer.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gegl/buffer/gegl-buffer.c b/gegl/buffer/gegl-buffer.c
index c06810a..a2480cf 100644
--- a/gegl/buffer/gegl-buffer.c
+++ b/gegl/buffer/gegl-buffer.c
@@ -39,6 +39,7 @@
 #include "gegl-buffer-types.h"
 #include "gegl-buffer.h"
 #include "gegl-buffer-private.h"
+#include "gegl-debug.h"
 #include "gegl-tile-storage.h"
 #include "gegl-tile-backend-file.h"
 #include "gegl-tile-backend-swap.h"