use #pragma once

radiant/server.h

@@ -19,13 +19,10 @@
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#if !defined( INCLUDED_SERVER_H )
-#define INCLUDED_SERVER_H
+#pragma once
 
 class ModuleServer;
 ModuleServer& GlobalModuleServer_get();
 void GlobalModuleServer_loadModule( const char* filename );
 void GlobalModuleServer_Initialise();
 void GlobalModuleServer_Shutdown();
-
-#endif