[gegl] operations: implicit declaration of function qsort

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

commit 1a2fe0e308dd10454ffd87787914ca879aa14b78
Author: lillolollo <4179-lillolollo users noreply gitlab gnome org>
Date:   Mon Apr 13 01:44:05 2020 +0000

    operations: implicit declaration of function qsort

 operations/common-gpl3+/tile-paper.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/operations/common-gpl3+/tile-paper.c b/operations/common-gpl3+/tile-paper.c
index 371fc6c76..abc9d8d66 100644
--- a/operations/common-gpl3+/tile-paper.c
+++ b/operations/common-gpl3+/tile-paper.c
@@ -19,6 +19,7 @@
 
 #include "config.h"
 #include <glib/gi18n-lib.h>
+#include <stdlib.h>
 
 
 #ifdef GEGL_PROPERTIES