[gegl] operation: fix typo in gegl-operation-private.h

[Ell <ell src gnome org>]

commit 001b9a8840bebef5614018f82a7dab8a5ec1b105
Author: Ell <ell_se yahoo com>
Date:   Thu Feb 21 13:14:44 2019 -0500

    operation: fix typo in gegl-operation-private.h

 gegl/operation/gegl-operation-private.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gegl/operation/gegl-operation-private.h b/gegl/operation/gegl-operation-private.h
index 5c646519f..9e4c84966 100644
--- a/gegl/operation/gegl-operation-private.h
+++ b/gegl/operation/gegl-operation-private.h
@@ -19,7 +19,7 @@
 #ifndef __GEGL_OPERATION_PRIVATE_H__
 #define __GEGL_OPERATION_PRIVATE_H__
 
-G_BEING_DECLS
+G_BEGIN_DECLS
 
 
 gboolean   gegl_operation_use_cache (GeglOperation *operation);