[gegl] workshop: fix GEGL_OP_C_SOURCE in saturation-yuv.c

[Michael Schumacher <schumaml src gnome org>]

commit d1d7de149156db417644951f0a90c4c9e101a3a1
Author: Michael Schumacher <schumaml gmx de>
Date:   Sun Jun 30 12:38:22 2019 +0200

    workshop: fix GEGL_OP_C_SOURCE in saturation-yuv.c

 operations/workshop/saturation-yuv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/operations/workshop/saturation-yuv.c b/operations/workshop/saturation-yuv.c
index 58fade752..df318259d 100644
--- a/operations/workshop/saturation-yuv.c
+++ b/operations/workshop/saturation-yuv.c
@@ -30,7 +30,7 @@ property_double (scale, "Scale", 1.0)
 
 #define GEGL_OP_POINT_FILTER
 #define GEGL_OP_NAME     saturation_hue_constant2
-#define GEGL_OP_C_SOURCE saturation-foo.c
+#define GEGL_OP_C_SOURCE saturation-yuv.c
 
 #include "gegl-op.h"