lib/osage: replace header guards with more modern #pragma once

diff --git a/lib/osage/osage.h b/lib/osage/osage.h
index 8bf442972172719c9f86860f73d26f73d4187d3a..320a2db6cc696cae258e283bd49907c8bf0d1150 100644 (file)
--- a/lib/osage/osage.h
+++ b/lib/osage/osage.h
@@ -8,8 +8,7 @@
  * Contributors: Details at https://graphviz.org
  *************************************************************************/
 
-#ifndef CLUSTER_H
-#define CLUSTER_H
+#pragma once
 
 #include "render.h"
 
@@ -23,4 +22,3 @@ extern void cluster_cleanup(Agraph_t * g);
 #ifdef __cplusplus
 }
 #endif
-#endif