[gegl] color-overlay: #include <math.h>

[N/A <ell src gnome org>]

commit 226afdde519398c303a32279d64b42a045903b30
Author: Ell <ell_se yahoo com>
Date:   Thu Mar 22 14:04:13 2018 -0400

    color-overlay: #include <math.h>
    
    ... for fabs().

 operations/workshop/color-overlay.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/operations/workshop/color-overlay.c b/operations/workshop/color-overlay.c
index 9cf8637..d91774d 100644
--- a/operations/workshop/color-overlay.c
+++ b/operations/workshop/color-overlay.c
@@ -37,6 +37,7 @@ property_boolean (srgb, _("sRGB"), FALSE)
 #define GEGL_OP_C_SOURCE color-overlay.c
 
 #include "gegl-op.h"
+#include <math.h>
 
 static void prepare (GeglOperation *operation)
 {