[gtk/debug-envvars-cleanup] gsk: Small fixup

[Matthias Clasen <matthiasc src gnome org>]

commit 5e38717a9f677be85f1b55824287b8f8bb712c45
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Sep 23 14:33:37 2022 -0400

    gsk: Small fixup
    
    config.h always needs to be included first thing.

 gsk/gskdebug.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/gsk/gskdebug.c b/gsk/gskdebug.c
index 83a3619fe7..cda64af2fa 100644
--- a/gsk/gskdebug.c
+++ b/gsk/gskdebug.c
@@ -1,3 +1,5 @@
+#include "config.h"
+
 #include "gskdebugprivate.h"
 #include "gdk/gdk-private.h"